Cleaning equipment capable of preventing hair from winding

Abstract

The utility model discloses cleaning equipment capable of preventing hair from winding, which belongs to the technical field of cleaning equipment and comprises a machine body provided with a mounting cavity, a driving device and a dust suction port, a rolling brush is arranged in the mounting cavity, and the bottom side of the rolling brush downwards extends out of the mounting cavity and is in contact with a surface to be cleaned. One end of the rolling brush is a driving end in transmission connection with the driving device, the other end of the rolling brush is a free end arranged in a suspended mode, the axial direction of the rolling brush is obliquely arranged relative to the advancing direction of the machine body so that the free end can be arranged backwards relative to the driving end, and the dust suction opening corresponds to the free end and is located on the rear side of the free end. Therefore, dirt moves from the driving end to the free end along with the negative-pressure airflow and is sucked away through the dust suction opening. Hair driven by the rolling brush can move from the driving end to the free end under the combined action of ground friction force and dust collection airflow, the hair moving to the free end can be smoothly separated from the rolling brush and is sucked away through the dust collection opening, the sweeping capacity of the rolling brush on a to-be-cleaned face is guaranteed, and the situation that the rolling brush rotates and is clamped is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a cleaning equipment for preventing hair from winding. Background Art

[0002] As a kind of intelligent household cleaning appliance, cleaning robots play an increasingly important role in people's daily lives. Existing cleaning robots are generally equipped with a roller brush, a dust box and a fan. The roller brush is arranged in the installation cavity and the bottom side contacts the surface to be cleaned. A dust suction port is arranged on the cavity wall of the installation cavity. The inlet of the dust box is connected to the dust suction port. When the fan is working, it provides suction to form a negative pressure airflow flowing from the dust suction port into the dust box. When the cleaning robot is working, the rotating roller brush cleans the surface to be cleaned, and the dirt brought by the roller brush is sucked into the dust box through the dust suction port under the suction of the negative pressure airflow, thereby achieving the purpose of dust collection. In the existing cleaning robots, one end of the roller brush is transmission-connected to the motor, and the other end is rotatably mounted on the body through a bearing. Hair is easily entangled on the roller brush. As the roller brush continues to rotate, the hair will become more and more entangled. The entangled hair will reduce the cleaning ability of the roller brush, which is not conducive to ensuring the cleaning effect of the roller brush on the surface to be cleaned. In addition, the hair entangled on the end of the roller brush will cause the roller brush to get stuck, which is not conducive to ensuring the smooth rotation of the roller brush. The hair entangled on the end of the roller brush will also increase the driving load of the motor. The cleaning robot is prone to shutdown due to excessive motor driving load, which is not conducive to ensuring the user experience. Utility Model Content

[0003] In order to solve the shortcomings and deficiencies existing in the above-mentioned prior art, the utility model provides a cleaning device that prevents hair entanglement. The hair driven by the roller brush can move from the driving end to the free end under the combined action of ground friction and negative pressure airflow. The hair moved to the free end can be smoothly detached from the roller brush and sucked away through the dust suction port, thereby ensuring the cleaning ability of the roller brush on the surface to be cleaned and avoiding the situation where the roller brush is stuck in rotation.

[0004] In order to achieve the above-mentioned technical objectives, the utility model provides a hair-tangle-proof cleaning device, including a body provided with an installation cavity, a driving device and a dust suction port, a roller brush driven by the driving device is provided in the installation cavity, the bottom side of the roller brush extends downward out of the installation cavity and contacts the surface to be cleaned, one end of the roller brush is a driving end that is transmission-connected to the driving device, and the other end is a free end that is suspended, the axial direction of the roller brush is inclined relative to the moving direction of the body so that the free end is arranged relatively rearward relative to the driving end, and the dust suction port is arranged corresponding to the free end and is located on the rear side of the free end, so that the dirt moves from the driving end to the free end following the negative pressure airflow and is sucked away through the dust suction port.

[0005] Preferably, two roller brushes are symmetrically arranged with respect to the moving direction of the machine body, the dust suction port is arranged corresponding to the free ends of the two roller brushes, and the central axes of the two roller brushes point to the dust suction port.

[0006] Preferably, the machine body has a central axis surface centered on the left and right, the two roller brushes are symmetrically distributed about the central axis surface, and the dust suction port is arranged in the center of the left and right relative to the machine body.

[0007] Preferably, the angle θ between the axial direction of the roller brush and the moving direction of the machine body is 30° to 80°.

[0008] Preferably, a spiral scraping portion is provided on the outer peripheral surface of the roller brush, and the scraping portion spirally extends from the driving end to the free end along the rotation direction of the roller brush.

[0009] Preferably, there is a gap between the outer peripheral surface of the roller brush and the cavity wall of the mounting cavity for dirt to move.

[0010] Preferably, the outer diameter of the roller brush gradually decreases from the driving end to the free end, so that the width of the gap gradually increases from the driving end to the free end; and / or the inner diameter of the mounting cavity gradually increases from the driving end to the free end, so that the width of the gap gradually increases from the driving end to the free end.

[0011] Preferably, the dust suction port is connected to the installation cavity.

[0012] Preferably, two side brushes are arranged at the bottom of the machine body, which are spaced apart from each other and rotate towards each other. The side brushes are located in front of the roller brush, and the roller brush is located between the two side brushes in the left-right direction.

[0013] Preferably, the driving device includes a driving motor and a transmission assembly, the driving motor drives the roller brush and the side brush simultaneously through the transmission assembly, the transmission assembly includes an axially vertical first transmission member and an axially horizontal second transmission member, the side brush is driven by the first transmission member, and the roller brush is driven by the second transmission member.

[0014] After adopting the above technical solution, the utility model has the following advantages:

[0015] 1. The cleaning device provided by the utility model has a roller brush with a driving end and a free end. The driving end is connected to the driving device by transmission, and the free end is suspended. The axial direction of the roller brush is tilted relative to the moving direction of the body, so that the free end is set relatively backward relative to the driving end, and the dust suction port is set corresponding to the backward free end and is located at the rear side of the free end. When the cleaning device is working, the driving device drives the roller brush to rotate, and the dirt brought by the roller brush moves from the driving end to the free end under the suction of the negative pressure airflow and is sucked away through the dust suction port. The hair driven by the roller brush can move from the driving end to the free end under the combined action of the ground friction and the negative pressure airflow. Since the free end is suspended, the hair moving to the free end can smoothly detach from the roller brush and be sucked away through the dust suction port. Reasonable improvements are made to the setting of the roller brush so that hair can be easily detached from the roller brush and sucked away through the suction port, reducing the probability of hair being entangled in the roller brush. On the one hand, this ensures the roller brush's ability to clean the surface to be cleaned, and on the other hand, it prevents the roller brush from getting stuck in rotation, thereby preventing the cleaning equipment from shutting down due to excessive driving load of the driving device, thereby ensuring the cleaning effect, dust suction effect and performance stability of the electrical components of the cleaning equipment, and improving the user experience.

[0016] 2. Preferably, two roller brushes are symmetrically arranged with respect to the direction of travel of the machine body, and the suction ports are arranged corresponding to the free ends of the two roller brushes. The central axes of the two roller brushes point to the suction ports. The number of roller brushes is reasonably arranged to ensure the cleaning efficiency of the roller brush as a whole on the cleaning surface while reducing the axial length of a single roller brush, thereby reducing the distance that dirt such as hair moves from the driving end of the roller brush to the free end, so that the hair driven by the roller brush can be separated from the roller brush after moving a short distance and sucked away through the suction port, thereby improving the collection effect of hair and further reducing the probability of hair being entangled on the roller brush. In addition, since the axial length of a single roller brush is reduced, the suction strength of the negative pressure airflow at the driving end of the roller brush is increased, and the dirt at the driving end can move toward the free end faster under the action of stronger suction, and the dirt moving to the free end can also be better separated from the roller brush and sucked away through the suction port, which is conducive to improving the suction effect.

[0017] 3. The two roller brushes are preferably symmetrically distributed about the central axis. Correspondingly, the dust suction port is centered on the left and right sides of the machine body. The distribution positions of the two roller brushes and the dust suction port relative to the machine body are reasonably arranged so that the weight of the machine body can be kept balanced on the left and right sides, so that the cleaning force of the two roller brushes on the surface to be cleaned can be basically the same, thereby ensuring the cleaning effect of the cleaning equipment on the surface to be cleaned while improving the walking stability of the cleaning equipment.

[0018] 4. The angle θ between the axial direction of the roller brush and the moving direction of the machine body is 30°~80°. The inclination angle of the axial direction of the roller brush relative to the moving direction of the machine body is reasonably set so that the hair driven by the roller brush can be subjected to effective ground friction, so that the hair can move smoothly toward the free end. If the angle θ is less than 30°, the projection length of the roller brush in the left and right directions is small, and the sweeping length of the roller brush when the machine body moves is short, which is not conducive to ensuring the cleaning efficiency of the roller brush on the surface to be cleaned. If the angle θ is greater than 80°, the ground friction force on the hair is small, which is not conducive to the smooth movement of the hair toward the free end.

[0019] 5. A spiral scraping part is preferably provided on the outer circumference of the roller brush. The scraping part spirally extends from the driving end to the free end along the rotation direction of the roller brush. The scraping part has a guiding effect on dirt when the roller brush rotates. Dirt including hair can move from the driving end to the free end under the guidance of the scraping part. Dirt moving to the free end can be separated from the roller brush and sucked away through the dust suction port. The specific structure of the roller brush is reasonably set to improve the dust suction effect and further prevent hair from being entangled on the roller brush.

[0020] 6. A gap is set between the outer peripheral surface of the roller brush and the wall of the installation cavity, and the gap is used to provide a certain movement space for dirt including hair. Negative pressure airflow can also flow in the gap, so that the hair and other dirt carried by the roller brush can move toward the free end through the gap under the suction of the negative pressure airflow and detach from the roller brush from the free end, thereby further preventing the hair from being entangled on the roller brush.

[0021] 7. The outer diameter of the roller brush preferably decreases gradually from the driving end to the free end, or the inner diameter of the mounting cavity increases gradually from the driving end to the free end, and the width of the gap gradually increases from the driving end to the free end by changing the outer diameter of the roller brush and / or the inner diameter of the mounting cavity. The width of the gap at the driving end is smaller, and correspondingly, the cross-sectional area of ​​the gap at the driving end perpendicular to the axial direction of the roller brush is smaller. Since the strength of the negative pressure airflow is inversely proportional to the flow area, the suction strength of the negative pressure airflow at the driving end can be appropriately increased, so that the dirt at the driving end can move smoothly toward the free end under the suction of the negative pressure airflow, thereby improving the dust collection effect. The width of the gap at the free end is larger, so that the hair and other dirt that move to the free end can be easily separated from the roller brush under the suction of the negative pressure airflow and sucked away through the dust suction port. Reasonable arrangement of the structure of the gap improves the smoothness of the separation of hair and other dirt from the roller brush, which is conducive to improving the dust collection effect.

[0022] 8. The dust suction port is preferably connected to the installation cavity, which can increase the suction strength of the negative pressure airflow in the installation cavity, so that hair and other dirt can move smoothly from the driving end to the free end under the suction of the negative pressure airflow, and the dirt separated from the roller brush at the free end can be easily sucked away through the dust suction port, thereby improving the suction effect of the negative pressure airflow on the dirt, which is beneficial to improving the dust suction effect.

[0023] 9. Two side brushes are arranged at intervals on the left and right and rotate in opposite directions at the bottom of the machine body. The side brushes are located in front of the roller brush, and the roller brush is located between the two side brushes in the left and right directions. When the cleaning device is working, the two side brushes rotate in opposite directions to gather the dirt on the surface to be cleaned inward, so that the rotating roller brush can lift the dirt from the surface to be cleaned, and the lifted dirt moves toward the free end under the suction of the negative pressure airflow. The structure of the machine body is reasonably set to improve the dust collection effect.

[0024] 10. The motor of the driving device drives the roller brush and the side brush simultaneously through the transmission assembly. The transmission assembly is provided with a first transmission member for driving the side brush and a second transmission member for driving the roller brush. The specific structure of the driving device is reasonably arranged, and one motor is used to drive two components simultaneously, thereby reducing the number of motors and transmission assemblies, thereby reducing the production cost and saving the internal space of the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the cleaning device of Example 1 along the front-to-back direction;

[0026] Figure 2 It is a schematic top view of the cleaning device of Example 1;

[0027] Figure 3 It is a bottom view schematic diagram of the cleaning device of Example 1;

[0028] Figure 4 It is a schematic diagram of the coordination between the roller brush and the driving device in the cleaning device of Example 1;

[0029] Figure 5 Schematic diagram of the coordination between the roller brush and the driving device in the cleaning device of Example 2 Figure 1 ;

[0030] Figure 6 Schematic diagram of the coordination between the roller brush and the driving device in the cleaning device of Example 2 Figure 2 ;

[0031] Figure 7 Schematic diagram of the coordination between the roller brush and the driving device in the cleaning device of Example 2 Figure 3 ;

[0032] Figure 8 It is a top view schematic diagram of the cleaning device of Example 3;

[0033] Fig. 9 This is a diagram showing the coordination structure of the driving device, the roller brush and the side brush in the cleaning device of the fourth embodiment;

[0034] Fig.10 It is an axial cross-sectional view of the driving device, the roller brush and the side brush in the cleaning device of Example 4.

[0035] In the figure, 100-body, 110-installation cavity, 120-dust suction port, 130-gap,

[0036] 200-driving device, 210-driving motor, 220-transmission assembly, 221-driving gear, 222-driven gear, 223-driving wheel, 224-intermediate wheel, 225-first transmission wheel, 225a-upper gear part, 225b-lower gear part, 226-second transmission wheel,

[0037] 300-roller brush, 310-driving end, 320-free end, 330-scraping part, 340-shaft section,

[0038] 400-side brush module, 410-side brush, 420-side brush motor,

[0039] 500-dust collection module, 510-dust box, 520-fan,

[0040] 610-Universal wheel, 620-Travel wheel. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] Embodiment 1

[0043] Combination Figures 1 to 4 The first embodiment of the utility model provides a hair entanglement prevention cleaning device, comprising a body 100 provided with a mounting cavity 110, a driving device 200 and a dust suction port 120. A roller brush 300 driven by the driving device 200 is provided in the mounting cavity 110. The bottom side of the roller brush 300 extends downward from the mounting cavity 110 and contacts the surface to be cleaned. One end of the roller brush 300 is a driving end 310 connected to the driving device 200 by transmission, and the other end is a free end 320 suspended. The axial direction of the roller brush 300 is inclined relative to the moving direction of the body 100 so that the free end 320 is arranged backward relative to the driving end 310. The dust suction port 120 is arranged corresponding to the free end 320 and is located at the rear side of the free end 320, so that the dirt moves from the driving end 310 to the free end 320 following the negative pressure airflow and is sucked away through the dust suction port 120.

[0044] The dirt carried by the roller brush 300 moves from the driving end 310 to the free end 320 under the suction of the negative pressure airflow and is sucked away through the dust suction port 120. The hair carried by the roller brush 300 can move from the driving end 310 to the free end 320 under the combined action of the ground friction and the negative pressure airflow. Since the free end 320 is suspended, the hair moving to the free end 320 can smoothly detach from the roller brush 300 and be sucked away through the dust suction port 120. The setting mode of the roller brush 300 is reasonably improved, so that the hair can be easily detached from the roller brush 300 and sucked away through the dust suction port 120, and the probability of hair being entangled on the roller brush 300 is reduced. On the one hand, the cleaning ability of the roller brush 300 on the surface to be cleaned is guaranteed, and on the other hand, the roller brush 300 is prevented from being stuck in rotation, thereby preventing the cleaning device from shutting down due to excessive driving load of the driving device 200, ensuring the cleaning effect, dust suction effect and performance stability of the electrical components of the cleaning device, and improving the user experience.

[0045] Combination Figure 1 , Figure 2 , Figure 3 This embodiment is described by taking a cleaning robot as an example. A universal wheel 610 and a walking wheel 620 are provided at the bottom of the body 100. A walking motor for driving the walking wheel 620 is provided inside the body 100. The walking motor can control the walking wheel 620 to rotate forward or reverse according to a pre-written program, so that the walking wheel 620 drives the body 100 to move forward or backward.

[0046] In this example, the machine body 100 has a central axis plane P centered on the left and right sides, and the front end of the machine body 100 is provided with two side brush modules 400 symmetrically distributed about the central axis plane P. The side brush module 400 includes a side brush 410 and a side brush motor 420 for driving the side brush 410 to rotate. The two side brushes 410 rotate towards each other under the drive of the side brush motor 420 to gather dirt on the surface to be cleaned toward the middle. As an alternative to this embodiment, the two side brush modules 400 can also be staggered about the central axis plane P, that is, one of the side brush modules 400 is arranged near the driving end 310 and is arranged near the free end 320 and is arranged at the rear.

[0047] In this embodiment, the installation cavity 110 is arranged behind the two side brush modules 400, and accordingly, the roller brush 300 arranged in the installation cavity 110 is also located behind the two side brush modules 400. The two side brushes 410 rotating in opposite directions gather the dirt on the surface to be cleaned toward the middle, so that the rotating roller brush 300 can lift the dirt from the surface to be cleaned. Furthermore, in order to make the dirt gathered by the side brushes 410 be better lifted by the rotating roller brush 300, the installation cavity 110 is located between the center points of the two side brushes 410 in the left-right direction, so that the roller brush 300 is also located between the center points of the two side brushes 410 in the left-right direction.

[0048] Combination Figure 4 In this embodiment, only one mounting cavity 110 is provided, and correspondingly, only one roller brush 300 is provided, and the axial direction of the mounting cavity 110 is consistent with the axial direction of the roller brush 300 . Specifically, the axial direction of the mounting cavity 110 is inclined relative to the central axis plane P and its inner diameter remains consistent in the axial direction, that is, the mounting cavity 110 is roughly a cylindrical cavity, and the outer diameter of the roller brush 300 is consistent in the axial direction, that is, the roller brush 300 adopts an equal-diameter cylindrical structure, the inner diameter of the mounting cavity 110 is slightly larger than the outer diameter of the roller brush 300 and the length of the mounting cavity 110 is slightly larger than the length of the roller brush 300, the roller brush 300 can be rotatably arranged in the mounting cavity 110 and axially arranged horizontally, and a gap 130 for dirt to flow is provided between the outer peripheral surface of the roller brush 300 and the cavity wall of the mounting cavity 110, and the width Δw of the gap 130 can be set to a reasonable size such as 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., and there is a gap between the two end faces of the roller brush 300 and the cavity wall on the corresponding side of the mounting cavity 110.

[0049] In this embodiment, the angle between the central axis L of the roller brush 300 and the central axis plane P is the angle θ between the axial direction of the roller brush 300 and the moving direction of the body 100, 30°≤θ≤80°, and the size of θ is reasonably set to ensure the cleaning range of the roller brush 300 when the body 100 moves. At the same time, the hair driven by the roller brush 300 can be subjected to effective ground friction, so that the hair can smoothly move toward the free end 320. In this embodiment, the angle θ is about 70°. As an alternative to this embodiment, the angle θ can also be set to other reasonable sizes such as 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 68°, 72°, 75°, 80°, etc.

[0050] In this embodiment, a dust collection module 500 is provided in the body 100 and is located behind the installation cavity 110. The dust collection module 500 includes a dust box 510 and a fan 520. The inlet of the dust box 510 is connected to the dust suction port 120, and the outlet of the dust box 510 is connected to the fan 520. When the fan 520 is working, it provides suction to form a negative pressure airflow flowing from the dust suction port 120 into the dust box 510. The dirt driven by the roller brush 300 follows the negative pressure airflow and flows from the dust suction port 120 into the dust box 510, thereby achieving the purpose of dust collection.

[0051] In this embodiment, in order to increase the suction strength of the negative pressure airflow on the dirt brought up by the roller brush 300 in the installation cavity 110, the dust suction port 120 is preferably connected to the installation cavity 110. Specifically, the dust suction port 120 is directly connected to the rear end of the installation cavity 110, so that the negative pressure airflow flows from the driving end 310 to the free end 320 of the roller brush 300 in the installation cavity 110. The dirt brought up by the roller brush 300 can flow toward the dust suction port 120 through the gap 130 under the suction force of the negative pressure airflow, and the dirt flowing toward the dust suction port 120 is sucked into the dust box 510 through the dust suction port 120.

[0052] In order to allow dirt to smoothly move toward the suction port 120 under the suction force of the negative pressure airflow, in this embodiment, a spiral sweeping portion 330 is provided on the outer circumference of the roller brush 300, the end of the sweeping portion 330 protrudes from the outer circumference of the roller brush 300, and the sweeping portion 330 spirally extends from the driving end 310 to the free end 320 along the rotation direction of the roller brush 300. The spirally extended sweeping portion 330 has a guiding effect on dirt when the roller brush 300 rotates, and dirt including hair can move from the driving end 310 to the free end 320 under the guidance of the sweeping portion 330, and dirt moving close to the free end 320 can be separated from the roller brush 300 and sucked away through the suction port 120. As an optional solution of this embodiment, the scraping part 330 can be provided with only a spiral scraping rubber strip, or only a plurality of clusters of scraping bristles distributed in a spiral shape, or a structure combining the scraping rubber strip and the scraping bristles can be adopted. Of course, the scraping part 330 can also adopt other reasonable structures.

[0053] In this embodiment, the driving device 200 is arranged in the body 100 and corresponds to the driving end 310. The driving device 200 includes a driving motor 210 and a transmission assembly 220. The driving motor 210 is axially vertical and is provided with a rotating shaft. The roller brush 300 is provided with a shaft section 340 protruding outward along the central axis L at the driving end 310. The shaft section 340 extends into the body 100. The transmission assembly 220 includes a driving gear 221 sleeved on the rotating shaft and a driven gear 222 sleeved on the shaft section 340. The driving gear 221 and the driven gear 222 are perpendicular to each other and meshed. When the driving motor 210 is working, the driving gear 221 and the driven gear 222 drive the roller brush 300 to rotate with its own central axis L as the rotation center line. As an alternative to this embodiment, the driving device 200 can also be arranged inside the roller brush 300.

[0054] In this embodiment, the installation cavity 110 is roughly located between the two running wheels 620 in the left and right direction. In order to improve the running smoothness of the body 100, the rotation direction of the roller brush 300 when the cleaning device is working is preferably consistent with the rotation direction of the running wheel 620 driving the body 100 to move, and the contact force between the roller brush 300 and the surface to be cleaned is used to assist the movement of the body 100.

[0055] When the cleaning device is working, the walking wheel 620 drives the body 100 to move forward, and the side brush motor 420 drives the two side brushes 410 to rotate inward. The two side brushes 410 rotating inward gather the dirt on the surface to be cleaned inward, and the roller brush 300 rotates with its own central axis L as the rotation center line under the drive of the driving device 200. The fan 520 provides suction to form a negative pressure airflow that flows from the driving end 310 to the free end 320 and flows into the dust box 510 through the dust suction port 120. The rotating roller brush 300 picks up the gathered dirt, and the picked up dirt is removed by the negative pressure air. The roller brush 300 moves toward the suction port 120 through the gap 130 under the suction force of the flow. Since the free end 320 of the roller brush 300 is suspended, the hair and other dirt that move to the free end 320 will be detached from the roller brush 300 and sucked away through the suction port 120, thereby preventing hair and other filaments from being entangled in the roller brush 300, thereby ensuring the cleaning ability of the roller brush 300 and preventing the roller brush 300 from getting stuck, thereby preventing the cleaning device from shutting down due to excessive driving load of the driving device 200, thereby ensuring the cleaning effect, dust suction effect and performance stability of the electrical components of the cleaning device.

[0056] The other structures of the cleaning robot refer to the prior art, such as a battery and a control board are provided in the body 100, a wiping component can be provided at the rear end of the body 100, etc., which will not be described in detail here.

[0057] Of course, the cleaning device of this embodiment is not limited to the cleaning robot described above or shown in the drawings, but also includes handheld cleaning machines such as handheld floor scrubbers, handheld floor wipers, and handheld vacuum cleaners with handles and manually operated by users.

[0058] Embodiment 2

[0059] In this embodiment, the width of the gap 130 gradually increases from the driving end 310 to the free end 320. The width of the gap 130 at the driving end 310 is small, and accordingly, the cross-sectional area of ​​the gap 130 at the driving end 310 perpendicular to the axial direction of the roller brush 300 is small. Since the strength of the negative pressure airflow is inversely proportional to the flow area, the suction strength of the negative pressure airflow at the driving end 310 can be appropriately increased, so that the dirt located at the driving end 310 can move smoothly toward the free end 320 under the suction of the negative pressure airflow, thereby improving the dust collection effect. The width of the gap 130 at the free end 320 is large, so that the hair and other dirt moving to the free end 320 can be easily separated from the roller brush 300 and sucked away through the dust suction port 120 under the suction of the negative pressure airflow. In addition, since the width of the gap 130 gradually increases, the dirt can move more smoothly toward the dust suction port 120 through the gap 130 under the suction of the negative pressure airflow, which is conducive to improving the dust collection effect.

[0060] Combination Figure 5In order to gradually increase the width of the gap 130 from the driving end 310 to the free end 320, this can be achieved by changing the outer diameter of the roller brush 300. Specifically, the roller brush 300 is conical and its outer diameter gradually decreases from the driving end 310 to the free end 320. The mounting cavity 110 adopts a constant diameter structure, and the change in the outer diameter of the roller brush 300 causes the width of the gap 130 to change accordingly. In order for the roller brush 300 to normally clean the surface to be cleaned, the central axis L of the roller brush 300 is set at a certain angle relative to the horizontal direction, so that the bottom side of the roller brush 300 is roughly parallel to the horizontal direction.

[0061] Combination Figure 6 In order to gradually increase the width of the gap 130 from the driving end 310 to the free end 320, it can also be achieved by changing the inner diameter of the mounting cavity 110. Specifically, the mounting cavity 110 is conical and its inner diameter gradually increases from the driving end 310 to the free end 320. The roller brush 300 adopts a constant diameter structure, and the width of the gap 130 is changed accordingly by utilizing the change in the inner diameter of the mounting cavity 110.

[0062] Combination Figure 7 In order to gradually increase the width of the gap 130 from the driving end 310 to the free end 320, it can also be achieved by combining the change of the outer diameter of the rolling brush 300 and the change of the inner diameter of the installation cavity 110. Specifically, the rolling brush 300 is tapered and its outer diameter gradually decreases from the driving end 310 to the free end 320, and the installation cavity 110 is tapered and its inner diameter gradually increases from the driving end 310 to the free end 320. In order to allow the rolling brush 300 to normally clean the surface to be cleaned, the central axis L of the rolling brush 300 is inclined at a certain angle relative to the horizontal direction, so that the bottom side of the rolling brush 300 is roughly parallel to the horizontal direction.

[0063] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0064] Embodiment 3

[0065] Combination Figure 8In this embodiment, two mounting cavities 110 are provided and are symmetrically distributed with respect to the moving direction of the machine body 100. Accordingly, two roller brushes 300 are symmetrically provided with respect to the moving direction of the machine body 100. The dust suction ports 120 are provided corresponding to the free ends 320 of the two roller brushes 300, and the central axes of the two roller brushes 300 point to the dust suction ports 120. The number of roller brushes 300 is reasonably set to ensure the overall cleaning efficiency of the roller brushes 300 on the cleaning surface while reducing the axial length of a single roller brush 300, thereby reducing the distance that the hair moves from the driving end 310 of the roller brush 300 to the free end 320, so that the hair driven by the roller brush 300 can be separated from the roller brush 300 after moving a short distance and sucked away through the dust suction port 120, thereby improving the hair collection effect and further reducing the probability of hair being entangled on the roller brush 300. In addition, since the axial length of a single roller brush 300 is reduced, the suction strength of the negative pressure airflow at the driving end 310 of the roller brush 300 is increased. The dirt at the driving end 310 can move toward the free end 320 faster under the action of the stronger suction force. The dirt that moves to the free end 320 can also be better separated from the roller brush 300 and sucked away through the dust suction port 120, which is beneficial to improving the dust suction effect.

[0066] In this embodiment, the two installation cavities 110 are preferably symmetrically distributed about the central axis plane P, and accordingly, the two roller brushes 300 are also symmetrically distributed about the central axis plane P, and the dust suction port 120 is preferably arranged in the middle of the machine body 100. The distribution positions of the two roller brushes 300 and the dust suction port 120 relative to the machine body 100 are reasonably arranged so that the weight of the machine body 100 can be kept balanced, so that the cleaning strength of the two roller brushes 300 on the surface to be cleaned can be basically the same, ensuring the cleaning effect of the cleaning device on the surface to be cleaned while improving the walking stability of the cleaning device.

[0067] In this embodiment, the two roller brushes 300 gradually approach each other from front to back, that is, the distance between the two driving ends 310 of the two roller brushes 300 is greater than the distance between the two free ends 320, and the dust suction port 120 is preferably directly connected to the rear ends of the two installation cavities 110 at the same time, so that the suction strength of the negative pressure airflow in the two installation cavities 110 can be basically consistent, and the negative pressure airflow flows from the driving end 310 of the roller brush 300 to the free end 320 in the two installation cavities 110.

[0068] In this embodiment, in order to allow dirt to move smoothly toward the dust suction port 120 under the suction force of the negative pressure airflow, a spiral scraping portion 330 is provided on the outer circumference of the two roller brushes 300. The scraping portion 330 spirally extends from the driving end 310 to the free end 320 along the rotation direction of the roller brush 300. The rotation direction of the roller brush 300 when the cleaning device is working is preferably consistent with the rotation direction of the walking wheel driving the body 100 to move.

[0069] In order to ensure that the dirt in the installation cavity 110 can be smoothly sucked away through the suction port 120 , in this embodiment, the vertical plane where the central axes L1 and L2 of the two roller brushes 300 are located intersects with the suction port 120 so that the central axes L1 and L2 of the two roller brushes 300 point to the suction port 120 .

[0070] In this embodiment, the roller brush 300 may adopt a constant diameter structure or a conical structure as described in the second embodiment. The mounting cavity 110 may adopt a constant diameter structure or a conical structure as described in the second embodiment.

[0071] The other structures of the third embodiment are the same as those of the first embodiment and will not be described in detail here.

[0072] Embodiment 4

[0073] Combination Fig. 9 , Fig.10 In this embodiment, in order to reduce the number of motors, the driving motor 210 drives the roller brush 300 and the side brush 410 simultaneously through the transmission assembly 220. The transmission assembly 220 includes a first transmission member arranged vertically in the axial direction and a second transmission member arranged horizontally in the axial direction. The side brush 410 is driven by the first transmission member, and the roller brush 300 is driven by the second transmission member. The specific structure of the driving device 200 is reasonably set, and one motor is used to drive two components at the same time, thereby reducing the number of motors and transmission structures, which can reduce the production cost and save the internal space of the body 100. Specifically, the driving device 200 is arranged between the driving end 310 of the roller brush 300 and the side brush 410, and the transmission assembly 220 includes a driving wheel 223, an intermediate wheel 224, a first transmission wheel 225 and a second transmission wheel 226. The driving motor 210 is axially vertical, the driving wheel 223 is sleeved on the rotating shaft of the driving motor 210, the intermediate wheel 224 is axially vertical and meshed with the driving wheel 223, the first transmission wheel 225 is axially vertical and includes an upper gear portion 225a and a lower gear portion 225b distributed up and down, the upper gear portion 225a is meshed with the intermediate wheel 224, the first transmission wheel 225 serves as a first transmission member, the side brush 410 is connected to the first transmission wheel 225, the second transmission wheel 226 serves as a second transmission member and is sleeved on the shaft section 340 of the roller brush 300, and the second transmission wheel 226 is axially horizontal and meshed with the lower gear portion 225b. When the driving motor 210 is working, it drives the driving wheel 223 to rotate. The rotating driving wheel 223 drives the first transmission wheel 225 to rotate through the intermediate wheel 224. The rotating first transmission wheel 225 drives the side brush 410 to rotate horizontally on the one hand, and drives the roller brush 300 to rotate with its own central axis as the rotation center line on the other direction through the second transmission wheel 226.

[0074] When only one roller brush 300 is provided in the structure of the first embodiment, one driving motor 210 can be used to drive the roller brush 300 and the side brush 410 near the driving end 310 at the same time, and the other side brush 410 is driven by the side brush motor. When two roller brushes 300 are provided in a bilaterally symmetrical manner in the structure of the third embodiment, two driving devices 200 are provided, and the two driving devices 200 are respectively located between the driving ends 310 of the two roller brushes 300 and the side brushes 410 near the driving ends 310, and each driving motor 210 drives one of the roller brushes 300 and the side brush 410 near the roller brush 300 at the same time.

[0075] In this embodiment, in order to enable the driving motor 210 to drive the roller brush 300 and the side brush 410 at the same time, the central axis of the roller brush 300 is preferably arranged horizontally.

[0076] The other structures of the fourth embodiment refer to the first embodiment and will not be described in detail here.

[0077] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A cleaning device for preventing hair entanglement, comprising a body provided with a mounting cavity, a driving device and a dust suction port, wherein a roller brush driven by the driving device is provided in the mounting cavity, the bottom side of the roller brush extends downward out of the mounting cavity and contacts the surface to be cleaned, one end of the roller brush is a driving end connected to the driving device by transmission, and the other end is a free end suspended in the air, characterized in that: The axial direction of the roller brush is inclined relative to the moving direction of the machine body so that the free end is arranged rearwardly relative to the driving end, and the dust suction port is arranged corresponding to the free end and is located on the rear side of the free end, so that dirt moves from the driving end to the free end along with the negative pressure airflow and is sucked away through the dust suction port.

2. A hair entanglement prevention cleaning device according to claim 1, characterized in that: The roller brushes are symmetrically arranged with respect to the moving direction of the machine body. The dust suction port is arranged corresponding to the free ends of the two roller brushes, and the central axes of the two roller brushes point to the dust suction port.

3. The anti-hair entanglement cleaning device according to claim 2, characterized in that: The machine body has a central axis surface centered on the left and right sides, two roller brushes are symmetrically distributed about the central axis surface, and the dust suction port is arranged in the center of the left and right sides relative to the machine body.

4. The anti-hair entanglement cleaning device according to claim 1, characterized in that: The angle θ between the axial direction of the roller brush and the moving direction of the machine body is 30° to 80°.

5. The anti-hair entanglement cleaning device according to claim 1, characterized in that: A spiral scraping portion is provided on the outer peripheral surface of the roller brush, and the scraping portion spirally extends from the driving end to the free end along the rotation direction of the roller brush.

6. The anti-hair entanglement cleaning device according to claim 1, characterized in that: There is a gap between the outer peripheral surface of the rolling brush and the cavity wall of the installation cavity for dirt to move.

7. A hair entanglement preventing cleaning device according to claim 6, characterized in that: The outer diameter of the roller brush gradually decreases from the driving end to the free end, so that the width of the gap gradually increases from the driving end to the free end; and / or the inner diameter of the mounting cavity gradually increases from the driving end to the free end, so that the width of the gap gradually increases from the driving end to the free end.

8. The hair entanglement preventing cleaning device according to claim 1, characterized in that: The dust suction port is communicated with the installation cavity.

9. A hair entanglement preventing cleaning device according to any one of claims 1 to 8, characterized in that: The bottom of the machine body is provided with two side brushes which are spaced apart from each other and rotate towards each other. The side brushes are located in front of the roller brush, and the roller brush is located between the two side brushes in the left-right direction.

10. The anti-hair entanglement cleaning device according to claim 9, characterized in that: The driving device includes a driving motor and a transmission assembly. The driving motor drives the roller brush and the side brush simultaneously through the transmission assembly. The transmission assembly includes a first axially vertical transmission member and an axially horizontally arranged second transmission member. The side brush is driven by the first transmission member, and the roller brush is driven by the second transmission member.

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