WO2025218052A1

WO2025218052A1 - Cleaning component and cleaning robot

Info

Publication number: WO2025218052A1
Application number: PCT/CN2024/109231
Authority: WO
Inventors: Shuai DU; Yan Zhang; Zheng SU
Original assignee: Dreame Innovation Technology Suzhou Co Ltd
Current assignee: Dreame Innovation Technology Suzhou Co Ltd
Priority date: 2024-04-14
Filing date: 2024-08-01
Publication date: 2025-10-23
Anticipated expiration: 2026-10-14
Also published as: DE202024102453U1; CN222622886U; DE202024104090U1

Abstract

A cleaning component (200) and a cleaning robot are provided. The cleaning component (200) includes a housing (210), a rolling brush (220), and a cutter (230); the housing (210) includes a rolling brush cavity (211); the rolling brush (220) is rotatably assembled in the rolling brush cavity (211) and includes a rolling shaft (221) and a brush member (222); the rolling shaft (221) includes a rolling shaft end (2211) detachably connected to the housing (210); the cutter (230) is disposed at a position adjacent to the rolling shaft end (2211) and configured to cut entanglement tangled on the rolling shaft end (2211); a projection of the cutter (230) on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end (2211) on the surface to be cleaned; and a rotation speed of the rolling brush (220) is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement.

Description

CLEANING COMPONENT AND CLEANING ROBOT

CROSS-REFERENCE TO RELATED APPLICATION

The disclosure claims the priority to and benefit of Chinese Patent Application No. 202420762142.0, filed on April 14, 2024, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The disclosure relates to the field of cleaning equipment, and in particular, to a cleaning component and a cleaning robot.

BACKGROUND

At present, cleaning robots include sweeping robots, mopping robots, sweeping and mopping integrated robots, floor scrubbers, and the like. The sweeping and mopping integrated robots can not only sweep the ground, but also realize the washing of the ground, making them increasingly common in family life. Generally, a sweeping and mopping integrated robot is assembled with cleaning components, which include a dry-cleaning component and a wet-cleaning component. The dry-cleaning component includes a dust suction component and a rolling brush component, and the sweeping and dust suction operations can be completed through the cooperation of the dust suction component and the rolling brush component.

With the cleaning of the cleaning robot on the ground, the hair on the ground is easy to enter the rolling brush component, and some hairs cannot be smoothly sucked into dust boxes and are tangled on the rolling brush component, which affects the cleaning of the rolling brush to the ground. In particular, when the hair clumps to form hair clusters, the hair clusters will tangle in certain positions of the rolling brush component, which will damage the rolling brush component and affect lifetime of the cleaning robot.

SUMMARY

According to some embodiments of the disclosure, a cleaning component is provided and includes:

a housing including a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and including a rolling shaft and a brush member; in which the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft includes a rolling shaft end detachably connected to the housing; and

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; in which a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction, and a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm;

in which the housing includes a cutter assembly portion assembled with the cutter; and in a state where the cutter is assembled in the cutter assembly portion, the cutter is disposed at the position adjacent to the rolling shaft end.

a housing including a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and including a rolling shaft and a brush member; in which the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft includes a rolling shaft end detachably connected to the housing;

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; in which a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction, and a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm; and

a rolling brush cover plate detachably assembled on the housing; in which the rolling brush cover plate includes a cutter assembly portion assembled with the cutter; and in a state where the rolling brush cover plate is assembled on the housing, the cutter is disposed at the position adjacent to the rolling shaft end.

a housing including a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and including a rolling shaft and a brush member; in which the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft comprises a rolling shaft end detachably connected to the housing; and

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; in which a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm.

a housing including a rolling brush cavity;

According to some embodiments of the disclosure, a cleaning robot is further provided and includes the cleaning component as described in any one of the above embodiments.

BRIEF DESCRIPTION OF DRAWINGS

In order to explain technical solutions in embodiments of the disclosure or the prior art more clearly, the following will briefly introduce the drawings needed to be used in description of the embodiments. Apparently, the drawings in the following description are only some embodiments of the disclosure. For ordinary skilled in the art, other drawings can be obtained from these drawings without paying creative effort.

FIG. 1 is a schematic three-dimensional structural diagram in a front view of a cleaning robot provided by some embodiments of the disclosure.

FIG. 2 is a schematic three-dimensional structural diagram in a bottom view of the cleaning robot provided by some embodiments of the disclosure.

FIG. 3 is a schematic three-dimensional structural diagram of a cleaning component provided by some embodiments of the disclosure.

FIG. 4 is a schematic three-dimensional structural diagram of a housing of the cleaning component provided by some embodiments of the disclosure.

FIG. 5 is a schematic three-dimensional structural diagram in a top view of the cleaning component provided by some embodiments of the disclosure.

FIG. 6 is a schematic diagram illustrating a relationship between a retention rate of hair clusters/lifetime of a cutting head and a rotation speed of a rolling brush provided by some embodiments of the disclosure.

FIG. 7 is a schematic structural diagram at an end of the cleaning component provided by some embodiments of the disclosure.

FIG. 8 is a schematic diagram illustrating a position relationship between a cutter and a rolling shaft provided by some embodiments of the disclosure.

FIG. 9 is a schematic diagram illustrating a relationship between a retention rate of hair clusters and a distance between the cutting head and a rolling shaft end provided by some embodiments of the disclosure.

FIG. 10 is a schematic partial-enlarged structural diagram of a cutter assembly portion provided by some embodiments of the disclosure.

FIG. 11 is a schematic structural diagram of a rolling brush cover plate provided by some embodiments of the disclosure.

Reference numerals:

100, robot body; 200, cleaning component; 210, housing; 211, rolling brush cavity; 212, driven-end assembly portion; 213, active-end assembly portion; 214, dust suction port; 215, cutter assembly portion; 215’, cutter assembly portion; 216, supporting member; 220, rolling brush; 221, rolling shaft; 2211, rolling shaft end; 222, brush member; 223, active-end end cover; 224, driven-end end cover; 230, cutter; 231, cutting head; 240, rolling brush cover plate; 241, switching member; 242, elastic member; 243, opening; 300, rag component; and 400, edge brush.

DESCRIPTION OF EMBODIMENTS

The following will provide a clear and complete description of technical solutions provided by the disclosure in conjunction with the drawings. Apparently, the embodiments in the following description are only some embodiments of the disclosure, not all of them. It should be noted that, the embodiments in the disclosure and features in the embodiments can be combined with each other without conflict.

It should be noted that the terms used in the disclosure, claims, and the drawings, such as “first” , “second” , and the like, are used to distinguish similar objects, and do not used to describe a specific order or sequence.

It should also be noted that the terms “include” , “contain” , or any other variation thereof are intended to encompass non-exclusive inclusion, such that a product or a device that includes a series of elements not only includes those elements, but also includes other elements that are not explicitly listed, or even includes elements inherent to such product or device. Without further limitations, the statement “including a” does not exclude the existence of another identical element in the product or the device that includes the element.

FIG. 1 and FIG. 2 are schematic structural diagrams of a cleaning robot according to some embodiments, and there are no specific limitations on the structure of the cleaning robot in the disclosure. For example, the cleaning robot may be a floor washing robot, a mopping robot, a sweeping robot, a sweeping and mopping integrated robot, or the like. As shown in FIG. 1 and FIG. 2, the cleaning robot being the sweeping and dragging integrated robot is taken as an example for description in the disclosure.

The cleaning robot includes a robot body 100, which includes a control unit, a driving unit, and the like. The control unit is configured to control the driving unit to realize the automatic movement of the cleaning robot. The robot body 100 is assembled with a cleaning component, a rag component, and other components. The control unit can control operations of the cleaning component and the rag component.

Referring to FIG. 1, FIG. 1 is a schematic three-dimensional structural diagram in a front view of the cleaning robot. In order to describe the behavior of the cleaning robot more clearly, the following directions are defined: a front-rear axis x, a left-right axis y, and an up-down axis z. A forward driving direction along the front-rear axis x is defined as “aforward direction” , which is a direction where an arrow of the front-rear axis x points, and a backward driving direction along the front-rear axis x is defined as “abackward direction” , which is opposite to the direction where the arrow of the front-rear axis x points. The left-right axis y is perpendicular to the front-rear axis x, and extends substantially along a direction of a center line that connects a left driving wheel and a right driving wheel. A direction where an arrow of the left-right axis y points is defined as “aleftward direction” , and a direction opposite to the direction where the arrow of the left-right axis y points is defined as “arightward direction” . The up-down axis z is perpendicular to both of the front-rear axis x and the left-right axis y, and substantially perpendicular to an upper surface of the robot body 100 of the cleaning robot, and also perpendicular to the ground. A direction where an arrow of the up-down axis z points is defined as “an upward direction” , and a direction opposite to the direction where the arrow of the up-down axis z points is defined as “adownward direction” .

As shown in FIG. 2, FIG. 2 is a schematic three-dimensional structural diagram in a bottom view of the cleaning robot. The cleaning robot includes two driving wheels, a cleaning component 200, a rag component 300, an edge brush 400, and other components. The cleaning component 200 includes a rolling brush and other members. In a state where the cleaning robot is placed on a cleaning surface, the rolling brush can make interference contact with the cleaning surface, so that the cleaning component 200 can move up and down. The rag component 300 includes two rag discs rotatably assembled on the robot body 100, and one of the rag discs can automatically swing outward to realize the cleaning of corner regions. The rotatable rag discs can automatically lift to avoid the regions that needs to be cleaned and dried. For the regions that require lifting of the rag discs, such as carpet regions, the cleaning component 200 can remove the hair from the carpet more effectively and reduce the possibility of wetting the carpet by wet hair tangled on the rolling brush, which can improve the cleaning experience of the carpet and enhance the user experience. In the forward direction of the cleaning robot, the rag component 300 is disposed behind the cleaning component 200. The cleaning component 200 can better sweep up and remove entanglement, such as hair clusters, and suck them into a dust suction port, thereby preventing hair clusters from being rotatably pushed to corners by the rag discs that swing outward, which makes it more difficult to clean, and avoid affecting the user experience due to the outward swinging of the rag discs. The edge brush 400 includes multiple long brush members. The edge brush 400 can continuously rotate to drive the long brush members to clean the garbage on the cleaning path. Because the multiple long brush members of the edge brush 400 extend beyond a projection range of the robot body 100, it is possible to clean corners that the cleaning robot cannot reach.

Referring to FIG. 3, FIG. 4, and FIG. 5, some embodiments of the disclosure provide the cleaning component 200, which includes a housing 210, a rolling brush 220, and a cutter 230. The housing 210 includes a rolling brush cavity 211 for accommodating a rolling brush 220. The housing 210 is detachably assembled on the robot body 100 or integrated with the robot body 100 to form the rolling brush cavity 211. The rolling brush 220 is rotatably assembled in the rolling brush cavity 211. The rolling brush 220 includes a rolling shaft 221 and at least one brush member 222. The rolling shaft 221 includes a rolling shaft end 2211 detachably connected to the housing 210. The brush member 222 is configured to clean a surface to be cleaned under rotation of the rolling shaft 221. The cutter 230 is disposed at a position adjacent to the rolling shaft end 2211 and configured to cut entanglement tangled on the rolling shaft end 2211. A projection of the cutter 230 on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end 2211 on the surface to be cleaned. The cutter 230 extends substantially along a direction parallel to the surface to be cleaned. When the surface to be cleaned is the ground, a projection of the cutter 230 on a horizontal plane at least partially overlaps a projection of the rolling shaft end 2211 on the horizontal plane. A rotation speed of the rolling brush 220 is greater than 900 rpm and less than 1500 rpm during the process of cutting the entanglement.

In some embodiments, as shown in FIG. 3 and FIG. 4, the housing 210 includes the rolling brush cavity 211 for accommodating the rolling brush 220. Two ends of the rolling brush cavity 211 are assembled with assembly portions for assembling the rolling brush 220. The assembly portions include an active-end assembly portion 213 and a driven-end assembly portion 212 configured to assemble an active-end and a driven-end of the rolling brush 220, respectively. The active-end of the rolling brush 220 includes an active-end end cover 223 that is connected to an output shaft for driving the rolling brush 220. The driven-end of the rolling brush 220 includes a driven-end end cover 224 that is clamped with the driven-end assembly portion 212. After the rolling brush 220 is assembled in the rolling brush cavity 211, the surface to be cleaned is cleaned by rotating the rolling brush 220. The rolling brush 220 includes the rolling shaft 221 and the brush member 222, and the brush member 222 extends along an axis direction of the rolling shaft 221 at a preset angle. When the cleaning robot performs cleaning operations, the rolling shaft 221 drives the brush member 222 to rotate to brush the ground. The cleaning component 200 is communicated with a dust suction motor that can form negative pressure in the rolling brush cavity 211, so that dirt on the ground can be sucked by the dust suction port on the cleaning component 200.

In some embodiments, there are multiple brush members 222, and each of the brush members 222 is in a spiral shape along the axial direction of the rolling shaft 221 and at the outer edge of the rolling shaft 221. The multiple brush members 222 are distributed substantially and evenly along a circumferential direction of the rolling shaft 221, and the multiple brush members 222 having spiral structures are substantially parallel. By designing the brush members 222 having the spiral structures, the front and rear rolling brushes 220 can easily roll up the garbage when rotating in opposite directions, and will not cause excessive impact force on the brush members 222 and not cause damage thereto, which can improve lifetime of the brush members 222.

In some embodiments, there are multiple brush members 222, and each of the brush members 222 is in a V-shape along the axial direction of the rolling shaft 221 and at the outer edge of the rolling shaft 221. The multiple brush members 222 are distributed substantially and evenly along the circumferential direction of the rolling shaft 221, and tips of the multiple brush members 222 having V-shaped structures point the same direction along the circumferential direction of the rolling shaft 221. By designing the brush members 222 having the V-shaped structures, the front and rear rolling brushes 220 can easily roll up the garbage when rotating in opposite directions, and will not cause excessive impact force on the brush members 222 and not cause damage thereto, which can improve lifetime of the brush members 222.

Referring to FIG. 4, in some embodiments, one side of the rolling brush cavity 211 is provided with a dust suction port 214, which is biased to one end of the axis of the rolling brush 220. The dust suction port 214 is communicated with the dust suction motor through a dust suction air duct. When the dust suction motor is in operation, negative pressure will be generated at the dust suction port 214, and the garbage below the rolling brush cavity 211 and the hair detached from the rolling brush 220 will be sucked into dust boxes or bags of the cleaning equipment through the dust suction port 214.

In some embodiments, each brush member 222 extends along the axial direction of the rolling shaft 221, and an angle between a line connecting one end of the brush member 222 to another end of the brush member 222 and the axis direction of the rolling shaft 221 ranges from 30 degrees to 45 degrees. The dust suction port 214 is biased to one end of the rolling shaft 221. When entanglement is cut off, scraps formed by the entanglement will move with the winding of the brush member 222. Therefore, when the angle of the axial inclination structure is designed ranging from 30 degrees to 45 degrees, it is more conducive to the entanglement being rolled up and brought into the dust suction port 214 that is biased to be arranged.

In some embodiments, the dust suction port 214 is communicated with the dust suction motor, which can generate a suction force greater than 10000 Pa. Generally, the cleaning robot has a suction force of about 9000 Pa. By setting the dust suction motor with the suction force greater than 10000 Pa, it can not only realize the suction to garbage on the ground, but also increase the suction force on the severed entanglement, which further increases the possibility of the entanglement being sucked into dust boxes or bags as soon as possible after being cut.

In some embodiments, the cleaning component 200 further includes an edge brush 400, and a cleaning range of the edge brush 400 partially overlaps a projection of the dust suction port 214 on the surface to be cleaned, so that an interference range of the edge brush 400 can cover part of the dust suction port 214, avoiding the severed entanglement from falling out of the cleaning range of the rolling brush 220. Moreover, the entanglement is swept to the dust suction port 214 through the secondary cleaning of the edge brush 400, and is further smoothly sucked into dust boxes or bags.

In some embodiments, as shown in FIG. 5, the rolling shaft 221 includes the rolling shaft end 2211 that exceeds beyond the brush member 222 in the axial direction. When the cleaning robot performs cleaning operations, there will be entanglement, such as hair clusters, silk threads, and the like, are tangled on the rolling shaft end 2211, and if not cleaned up in time, it may damage the cleaning component 200. Therefore, in some embodiments of the disclosure, a cutter 230 is provided at a position adjacent to the rolling shaft end 2211. As the rolling brush 220 rotates at a rotation speed greater than 900 rpm and less than 1500 rpm, the cutter 230 smoothly cuts off the entanglement tangled on the rolling shaft end 2211, then the severed entanglement is sucked into dust boxes by the dust suction motor. During the cutting process of cutting the entanglement, the rotation speed of the rolling brush 220 cannot be less than 900 rpm, otherwise, the force when the entanglement is in contact with a cutting head of the cutter 230 is too small, the entanglement cannot be cut off smoothly. Moreover, the rotation speed cannot be greater than 1500 rpm during the cutting process, and if the rotation speed is too fast, the cutting head of the cutter 230 cannot form effective contact with the clumped hair clusters, causing worse cutting effect. Larger noise can also be formed because of the excessively fast rotation speed of the roller brush 220, and there will be more energy consumption. In addition, if the rotation speed is too fast, larger particle foreign objects on the ground are easily brushed on the rolling shaft end 2211, causing excessive wear of the cutting head of the cutter 230 and even damaging the cutting head.

For the surfaces to be cleaned, especially in the cleaning environment where people come and go frequently, such as in homes, offices, and the like, there will be a lot of hairs that need to be cleaned, especially long hairs, which are often dry after staying on the ground for a long time, and are easy to absorb mutually and clump to form hair clusters. Generally, the hair clusters formed by dozens of hairs are thicker than a single hair, forming the entanglement similar to a rope, and it is difficult to completely clean it by using the brush members 222 of the rolling brush 220 alone, and the hair clusters tend to be tangled in gaps of the rolling brush end 2211 with the rotation of the rolling brush 220 and tangled on the rolling shaft 221, which may cause the rolling brush 220 to stop and even damage the cleaning equipment in serious cases. By setting the cutter 230 and controlling the rotation rate of the rolling brush 220, the disclosure can effectively remove entanglement such as hairs, so as to improve the cleaning effect. When the entanglement reaches the state that needs to be cleaned, the cleaning robot will automatically or manually enter an operation state of removing the entanglement, and clean the entanglement until it meets certain preset conditions, then it is considered that the entanglement has been basically cleaned. The preset conditions include a retention rate of less than 30%for the entanglement. Generally, the operation state of removing the entanglement can be the state that the cleaning component 200 is entangled by the entanglement while the cleaning component 200 is operating. The cleaning component 200 is operating can be the work of only removing entanglement, such as the state where the cleaning robot is removed from the cleaning surface, the rolling brush 220 rotates while cutting the entanglement through the cutter 230. Alternatively, it can also be the work of cleaning working and removing the entanglement at the same time, for example, in the state of not being removed from the cleaning surface, increasing the rotation speed such that the rolling brush 220 continues to rotate and sweep the cleaning surface, and the entanglement can be cut through the cutter 230 at the same time. In a word, as long as the rolling shaft end 2211 is entangled by entanglement such as hair clusters, and it is necessary to increase the rotation speed of the rolling brush 220 to make the cutter 230 cut the entanglement, it can be regarded as the operation state of removing the entanglement.

Referring to FIG. 6, a relationship between a retention rate of hair clusters/lifetime of the cutting head and a rotation speed of the rolling brush is obtained, and the relationship between the retention rate of hair clusters and the rotation speed of the rolling brush is analyzed in the following. During the experimental process to obtain the relationship, a distance between the cutting head 231 and the rolling shaft end 221 maintained at a constant value, such as 1.5 mm, and the retention rate of hair clusters was calculated by continuously adjusting the rotation speed of the rolling brush 220. In the disclosure, the retention rate of hair clusters refers to a ratio of the retention amount of hairs after performing cutting hair clusters and the amount of hairs before performing cutting hair clusters. Specifically, a certain amount (can be weight, volume, etc. ) of hair clusters can be placed in the position to be cut before the experimental test, then the cutting process was started and the retention amount of hairs are calculated to calculate the retention rate of hair clusters according to the ratio of the two. As can be seen from FIG. 6, when the rotation speed of the rolling brush 220 reaches 900 rpm, the retention rate of hair clusters significantly decreases, from about 60%directly to about 30%, which already meets the purpose of cutting hair clusters and preventing the hair clusters from being tangled on the rolling shaft 221. With the further increasing of the rotation speed, for example, when the rotation speed of the rolling brush 220 reaches 1500 rpm, the retention rate of hair clusters is basically close to 5%, indicating that the hair clusters are almost cleaned. When increasing the rotation speed of the rolling brush 220 again, for example, from 1600 to 2000 rpm, the retention rate of hair clusters also maintains around the corresponding range. And if the rotation speed is too fast, the cutting head 231 cannot form sufficient contact with the clumped hair clusters, making the cutting effect slightly worse, and significantly increasing the power consumption and noise. Therefore, when the rotation speed of the rolling brush 220 maintains at the range of 900 pm to 1500 rpm, an ideal cutting state can be realized.

Continue to refer to FIG. 6, the relationship between the retention rate of hair clusters/lifetime of the cutting head and the rotation speed of the rolling brush is obtained, and the relationship between the retention rate of hair clusters and the lifetime of the cutting head is analyzed in the following. During the experimental process to obtain the relationship, the distance D between the cutting head 231 and the rolling shaft end 221 also maintained at a constant value, such as 1.5 mm, and the lifetime of the cutting head 231 was calculated by continuously cutting the hair clusters. In the disclosure, the lifetime of the cutting head 231 refers to the use time of the cutting head 231 from a brand new state to a severely worn state, and was measured in the unit of cumulative hours of use. The severely worn state refers to a state in which the hair clusters can no longer be cut and the hair clusters are stuck. As can be seen from FIG. 6, before the rotation speed of the rolling brush 220 reaches 900 rpm, it is basically in a non-cutting state, and the cutting head 231 can maintain a substantially stable lifetime. When the rotation speed of the rolling brush 220 reaches 900 rpm, it enters the operation state of cutting hair clusters, and the lifetime of the cutting head 231 begins to decrease. When the rotation speed of the rolling brush 220 is greater than 1500 rpm, the lifetime of the cutting head 231 significantly decreases, and if the rotation speed of the rolling brush 220 is too fast, hard foreign objects (such as ropes, cloth strips, etc. ) outside the hair will be sucked at the cutting head 231, causing damage to the cutting head 231, thereby affecting the lifetime of the cutting head 231. Therefore, when the rotation speed of the rolling brush 220 maintains at the range of 900 pm to 1500 rpm, an ideal cutting state can be realized, and the lifetime of the cutting head 231 also maintains under a normal wear expectation.

In some embodiments, the rotation speed of the rolling brush 220 is greater than 1100 rpm and less than 1400 rpm in the operation state of removing entanglement. Specifically, the rotation speed of the rolling brush 220 can be 1200 rpm, 1260 rpm, 1320 rpm, 1400 rpm, or the like. Within the above range, as shown in FIG. 6, the retention rate of hair clusters maintains between 5%and 15%, which basically meets the purpose of cleaning hair clusters.

In some embodiments, the rotation speed of the rolling brush 220 of the cleaning component 200 in the operation state of not removing the entanglement, is less than or equal to the rotation speed of the rolling brush 220 in the operation state of removing entanglement. The state of not removing the entanglement refers to the state that the rolling brush 220 is not entangled by the entanglement and the rolling brush 220 is in a rotational state, for example, the cleaning robot is sweeping the ground, but not entangled by the entanglement. In this case, the rotation speed of the rolling brush 220 in the state of not being entangled by the entanglement, being reduced to be less than the rotation speed of the rolling brush 220 in the operation state of removing the entanglement, can avoid wasting energy due to excessively fast rotation speed.

During the normal cleaning process of the cleaning robot, that is, the cleaning robot is in the operation state of not removing entanglement, the rotation speed of the rolling brush 220 is generally less than 900 rpm. For example, the rotation speed of the rolling brush 220 is about 600 rpm when the cleaning robot mops the ground in a silent mode, and the rotation speed ranges from 600 rpm to 900 rpm during the conventional cleaning process. Because the hair clusters usually have a certain coarseness, at the rotation speed of the cleaning process (for example, less than 900 rpm) , even if the hair clusters are in contact with the cutting head 231 of the cutter 230, it is difficult to cut them off and disengage from the tangled state due to the insufficient contact force between the hair clusters and the cutting head 231 of the cutter 230. As shown in FIG. 6, when the rotation speed of the rolling brush 220 ranges from 600 rpm to 900 rpm, the retention rate of hair clusters is greater than 60%, even close to 90%, therefore, the entanglement cannot be removed effectively. Through experiments, it has been found in the disclosure that when the rotation speed of the rolling brush 220 is increased to be greater than 900 rpm, the impact force of the cutting head 231 of the cutter 230 on the entanglement, especially the hair clusters, can be improved, therefore, the hair clusters can be more easily thrown to the cutting head 231 of the cutter 230, and the improved impact force can cut off the hair clusters and disengage from the tangled state of the rolling shaft end 2211. When the rotation speed of the rolling brush 220 is less than 1500 rpm, it will not produce dust due to excessively fast rotation speed, nor will it produce higher noise and affect the normal operation. In the state of removing hair clusters, when the rolling brush 220 rotates at the rotation speed in the above range, the removal effect of hair clusters can be improved without affecting the normal cleaning effect of the cleaning component 200.

In some embodiments, the rotation speed of the rolling brush 220 of the cleaning robot in the operation state of not removing entanglement, is less than the rotation speed in the operation state of removing entanglement. For example, during the conventional cleaning process of not removing entanglement, the rotation speed usually ranges from 600 rpm to 900 rpm, which can ensure the operation state of silent cleaning, save energy consumption, and improve user experience. When hair clusters clump to a certain extent and need to be removed, manually or automatically increasing the rotation speed of the rolling brush 220, for example, to 900-1500 rpm, can effectively perform the removal task of hair clusters.

Specifically, in the use of the cleaning robot, the position of hair can be detected by artificial intelligence (AI) , and after reaching that position, it is judged to be in a tangled state. The hair can also be detected by adjusting the rotation speed of the rolling brush 220 or other sensors. For example, the rotation speed significantly decreases under normal output power, indicating that there is entanglement tangled on the rolling shaft end 2211 and the entanglement affects the rotation of the rolling shaft 221. In this case, the task of removing entanglement can be performed by increasing the output power and adjusting the rotation speed of the rolling brush 220 in the range of 900 rpm to 1500 rpm. The rotation speed of the rolling brush 220 can also maintain at a constant value in the range of 900 rpm to 1500 rpm, for example, at 1100 rpm all the time; as long as there is entanglement, it can be cut off by the cutter 230, so that the detection of whether there is entanglement can be saved, which saves the control of the rotation speed and the control resources.

In some embodiments, as shown in FIG. 7 and FIG. 8, FIG. 7 illustrates a schematic structural diagram of the cleaning component assembled with the cutter, FIG. 8 illustrates a schematic diagram of a position relationship between the cutter and the rolling shaft. Alternatively, when the cutter 230 is in the operation state of removing entanglement, a minimum distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 221 ranges from 1 mm to 2 mm. In the disclosure, the minimum distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 221 refers to a shortest distance between one end of the cutting head 231 and a tangent plane of a curved surface of the rolling shaft end 221. Due to the fact that the usual coarseness of hair clusters ranges from 1 mm to 3 mm, it is easiest for the hair clusters to be cut off by the cutter 230. In the disclosure, the hair clusters can be effectively clamped between the cutting head 231 and the rolling shaft 221 by setting the minimum distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 2211 in the range of 1 mm to 2 mm, so as to enhance the contact strength between the hair clusters and the cutting head 231, and better cut off the hair clusters. Moreover, the hair clusters can be cut off to form shorter hair scraps, so as to disengage from the tangled state. If the distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 221 is set to be greater than 2 mm, for example, 4 mm, only when the coarseness of the clumped hair clusters reaches about 4 mm, will it be cut by the cutting head 231, but the hair clusters at this time are difficult to be cut off due to a coarser state, which may damage the cutting head 231, or cause the rolling brush 220 to lock up and arise the risk of damaging the motor. In addition, if the distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 2211 is set to be less than 1 mm, hard foreign objects (such as ropes, cloth strips, etc. ) that are accidentally brought into the cutting head 231 are easily stuck, which may cause damage to the cutting head 231, thereby affecting the lifetime of the cutting head 231, or causing the rolling brush 220 to lock up and arise the risk of damaging the motor. Therefore, the minimum distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 2211 being in the range of 1 mm to 2 mm is an optimal cutting distance.

Referring to FIG. 9, a relationship between the retention rate of hair clusters and the distance between the cutting head and the rolling shaft end is obtained. During the experimental process to obtain the relationship, the rotation speed of the rolling brush 220 maintained at a constant value, such as 1300 rpm, and the retention rate of hair clusters was calculated by continuously adjusting the distance D between the cutting head 231 and the rolling shaft end 2211. In the disclosure, the definition of the retention rate of hair clusters is described above and will not be repeated here. As can be seen from FIG. 9, when the distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 2211 is 1 mm, the retention rate of hair clusters significantly decreases, from about 90%directly to about 30%, which already meets the purpose of cutting hair clusters and preventing the hair clusters from being tangled on the rolling shaft 221. With the further increasing of the distance D between the cutting head 231 of the cutter 230 and the rolling shaft end 2211, for example, when the distance D is 1.5 mm, the retention rate of hair clusters is basically close to 10%, indicating that the hair clusters are almost cleaned. However, when the distance D is greater than 2 mm, the retention rate of hair clusters significantly increases. Therefore, setting the minimum distance D in the range of 1 mm to 2 mm can effectively cut hair clusters.

In some embodiments, the cutter 230 extends substantially along the horizontal direction, a height of a plane where the cutter 230 is located is lower than a height of a vertex of the rolling shaft 221, and a projection of the cutting head 231 of the cutter 230 on the horizontal plane is located within a range of a projection of the rolling shaft 221 on the horizontal plane, so as to further ensure that the cutting head 231 of the cutter 230 has sufficient interference with hair clusters to smoothly cut off the hair clusters.

In some embodiments, as shown in FIG. 4, the housing 210 includes at least one cutter assembly portion 215 assembled with the cutter 230. When the cutter 230 is assembled in the cutter assembly portion 215, the cutter 230 is disposed at a position adjacent to the rolling shaft end 2211. One cutter assembly portion 215 or two cutter assembly portions 215 can be designed, and when there are two cutter assembly portions 215, the two cutter assembly portions 215 are substantially disposed at two opposite sides of the rolling shaft end 2211. At least part of one cutter 230 can be accommodated in one cutter assembly portion 215 to avoid scratching the cleaning component 200 or human body during the assembly process. When the cutter assembly portion 215 is assembled in the cleaning component 200, the cutter 230 exposes from the cutter assembly portion 215 and positions at the cutting position to facilitate the cutting of entanglement.

In some embodiments, as shown in FIG. 10, the cleaning component 200 further includes at least one switching member 241 configured to enable the cutter 230 to switch between a storage position and an ejection position. The switching member 241 can move within a certain range inside of the cutter assembly portion 215. The switching member 241 is linked with the cutter 230. The cutter 230 extends out of the cutter assembly portion 215 when the switching member 241 is opened, and the cutter 230 retracts into the cutter assembly portion 215 when the switching member 241 is closed. The switching member 241 can be integrated with the cutter 230, or, the cutter 230 is fixed at the edge of the switching member 241 and linked with the switching member 241. One switching member 241 can be arranged, or two switching members 241 are symmetrically arranged to enable the cutter 230 to move towards two positions to be cut.

In some embodiments, the cleaning component 200 further includes an elastic member 242. The elastic member 242 is connected to the switching member 241 to provide the switching member 241 with a recovery elastic force when retracts, so that the cutter 230 switches from the ejection position to the storage position. The elastic member 242 can be a spring, an elastic rope, or the like, and is not limited thereto.

In some embodiments, the cleaning component 200 further includes a supporting member 216 configured to abut against an inclined surface of the switching member 241. The switching member 241 moves outward under the support of the supporting member 216, so that the cutter 230 switches from the storage position to the ejection position.

In some embodiments, as shown in FIG. 7 and FIG. 11, the cleaning component 200 further includes a rolling brush cover plate 240 detachably assembled on the housing 210. The rolling brush cover plate 240 includes at least one cutter assembly portion 215’ disposed at an edge of the rolling brush cover plate 240. When the rolling brush cover plate 240 is assembled on the housing 210, the cutter assembly portion 215’ is close to the rolling shaft end 2211. The cutter assembly portion 215’ is assembled with the cutter 230, and the cutter 230 is disposed at a position adjacent to the rolling shaft end 2211. As shown in FIG. 7, when the rolling brush cover plate 240 is assembled on the housing 210, the supporting member 216 extends from an opening 243 of the cutter assembly portion 215’ into the cutter assembly portion 215’, and the supporting member 216 abuts against the inclined surface of the switching member 241, making the switching member 241 move outward and drive the cutter 230 to switch from the storage position to the ejection position.

In view of foregoing, the cutter assembly portion (215, 215’) can be disposed at one side of the housing 210, or at one side of the rolling brush cover plate 240. When the cutter assembly portion 215 is disposed at one side of the housing 210, the supporting member 216 is disposed at one side of the rolling brush cover plate 240, and when the rolling brush cover plate 240 is assembled on the housing 210, the supporting member 216 extends into the cutter assembly portion 215 from top to bottom from the opening 243 of the cutter assembly portion 215 to abut against the switching member 241. When the cutter assembly portion 215’ is disposed at one side of the rolling brush cover plate 240, the supporting member 216 is disposed at one side of the housing 210, and when the rolling brush cover plate 240 is assembled on the housing 210, the supporting member 216 extends into the cutter assembly portion 215’ from top to bottom from the opening 243 of the cutter assembly portion 215’ to abut against the switching member 241.

In some embodiments, the rolling brush 220 can be a single brush or a double brush. Taking the double brush shown in FIG. 3 as an example, the cutter 230 is disposed between two rolling shaft ends 221 of two rolling brushes 220. Further, two cutters 230 extending in opposite directions can be disposed by setting two cutter assembly portions (215, 215’) corresponding to the two cutters 230, respectively, and entanglement on two rolling brush ends 2211 can be cut simultaneously, which can save space, and the entanglement tangled on the two rolling brushes 220 can be reasonably removed. Alternatively, there are two, three, or four cutters 230, the cutters 230 can be disposed at one end or two ends of the rolling brush 220, and the cutting heads 231 of the cutters 230 are respectively oriented towards the corresponding rolling shaft ends 2211, so as to comprehensively cut the entanglement tangled on the corresponding rolling shafts 221.

In the above embodiments of the disclosure, the cutter is disposed at the position adjacent to the rolling shaft end of the cleaning component, so that the projection of the cutter on the horizontal plane at least partially overlaps the projection of the rolling shaft end on the horizontal plane, and the entanglement tangled on the rolling shaft end shaft can be cut, then the severed entanglement is smoothly sucked away by the dust suction equipment, avoiding the impact of the entanglement on the cleaning effect of the cleaning robot and avoiding damage to the cleaning component. Moreover, during the process of cutting the entanglement, the rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm, which can realize the effective cutting of entanglement.

Finally, it should be noted that each embodiment in this context is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between various embodiments can refer to each other. For the system or device disclosed by the embodiments, the description is relatively simple as it corresponds to the method disclosed by the embodiments. Please refer to the method section for relevant information.

The above embodiments are only used to illustrate the technical solutions of the disclosure, and not to limit it. Although detailed explanations of the disclosure have been provided with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the disclosure.

Claims

A cleaning component comprising:

a housing comprising a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and comprising a rolling shaft and a brush member; wherein the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft comprises a rolling shaft end detachably connected to the housing; and

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; wherein a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction, and a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm;

wherein the housing comprises a cutter assembly portion assembled with the cutter; and in a state where the cutter is assembled in the cutter assembly portion, the cutter is disposed at the position adjacent to the rolling shaft end.
The cleaning component of claim 1, wherein the cutter assembly portion further comprises a switching member configured to enable the cutter to switch between a storage position and an ejection position.
The cleaning component of claim 2, further comprising a supporting member configured to abut against the switching member, enabling the cutter to switch from the storage position to the ejection position.
The cleaning component of claim 2, wherein the cutter assembly portion further comprises an elastic member configured to enable the cutter to switch from the ejection position to the storage position.
A cleaning component comprising:

a housing comprising a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and comprising a rolling shaft and a brush member; wherein the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft comprises a rolling shaft end detachably connected to the housing;

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; wherein a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction, and a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm; and

a rolling brush cover plate detachably assembled on the housing; wherein the rolling brush cover plate comprises a cutter assembly portion assembled with the cutter; and in a state where the rolling brush cover plate is assembled on the housing, the cutter is disposed at the position adjacent to the rolling shaft end.
The cleaning component of claim 5, wherein the cutter assembly portion further comprises a switching member configured to enable the cutter to switch between a storage position and an ejection position.
The cleaning component of claim 6, further comprising a supporting member configured to abut against the switching member, enabling the cutter to switch from the storage position to the ejection position.
The cleaning component of claim 6, wherein the cutter assembly portion further comprises an elastic member configured to enable the cutter to switch from the ejection position to the storage position.
A cleaning component comprising:

a housing comprising a rolling brush cavity;

a rolling brush rotatably assembled in the rolling brush cavity and comprising a rolling shaft and a brush member; wherein the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft comprises a rolling shaft end detachably connected to the housing; and

a cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; wherein a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; the cutter extends substantially along a horizontal direction; a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement; and a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm.
The cleaning component of claim 9, wherein a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located; or, a height of a plane where the cutter is located is substantially equal to a height of a tangent plane where a highest point of the rolling shaft is located.
A cleaning component comprising:

a housing comprising a rolling brush cavity;

at least one rolling brush rotatably assembled in the rolling brush cavity and comprising a rolling shaft and a brush member; wherein the brush member extends substantially from an end of the rolling shaft to another end of the rolling shaft, and the brush member is configured to clean a surface to be cleaned under rotation of the rolling shaft; and the rolling shaft comprises a rolling shaft end detachably connected to the housing; and

at least one cutter disposed at a position adjacent to the rolling shaft end and configured to cut entanglement tangled on the rolling shaft end; wherein a projection of the cutter on the surface to be cleaned at least partially overlaps a projection of the rolling shaft end on the surface to be cleaned; and a rotation speed of the rolling brush is greater than 900 rpm and less than 1500 rpm during a cutting process of cutting the entanglement.
The cleaning component of claim 11, wherein a distance between a cutting head of the cutter and the rolling shaft end ranges from 1 mm to 2 mm.
The cleaning component of claim 11, wherein the cutter extends substantially along a horizontal direction; and a height of a plane where the cutter is located is lower than a height of a tangent plane where a highest point of the rolling shaft is located.
The cleaning component of claim 11, wherein the housing comprises a cutter assembly portion assembled with the cutter; and in a state where the cutter is assembled in the cutter assembly portion, the cutter is disposed at a position adjacent to the rolling shaft end.
The cleaning component of claim 11, further comprising a rolling brush cover plate detachably assembled on the housing, wherein the rolling brush cover plate comprises a cutter assembly portion assembled with the cutter; and in a state where the rolling brush cover plate is assembled on the housing, the cutter is disposed at the position adjacent to the rolling shaft end.
The cleaning component of claim 14 or 15, wherein the cutter assembly portion further comprises a switching member configured to enable the cutter to switch between a storage position and an ejection position.
The cleaning component of claim 16, further comprising a supporting member configured to abut against the switching member, enabling the cutter to switch from the storage position to the ejection position.
The cleaning component of claim 16, wherein the cutter assembly portion further comprises an elastic member configured to enable the cutter to switch from the ejection position to the storage position.
The cleaning component of claim 11, wherein an angle between a line connecting an end of the brush member to another end of the brush member and an axial direction of the rolling shaft ranges from 30 degrees to 45 degrees.
The cleaning component of claim 19, wherein a side of the rolling brush cavity away from the cutter is connected to a dust suction port.
The cleaning component of claim 20, further comprises an edge brush, wherein the edge brush is configured to have a cleaning range partially overlapping a projection of the dust suction port on the surface to be cleaned.
The cleaning component of claim 20, wherein the dust suction port is communicated with a dust suction motor configured to generate a suction force greater than 10000Pa.
The cleaning component of claim 11, wherein the rotation speed of the rolling brush in an operation state of not cutting the entanglement is less than the rotation speed of the rolling brush in a state of cutting the entanglement.
The cleaning component of claim 11, wherein the cleaning component comprises two rolling brushes, and the cutter is disposed between the two rolling brushes.
The cleaning component of claim 11, wherein the cleaning component comprises two cutters, three cutters, or four cutters.
The cleaning component of claim 11, wherein the entanglement comprises at least one of hair clusters and silk threads.
A cleaning robot comprising the cleaning component as claimed in any one of claims 1 to 26.