EP4643736A1

EP4643736A1 - Cleaning scrubber and automated cleaning device

Info

Publication number: EP4643736A1
Application number: EP23910221.3A
Authority: EP
Inventors: Pan CHENG; Xiang Lin; Zhiwei Zhou
Original assignee: Beijing Rockrobo Technology Co Ltd
Current assignee: Beijing Rockrobo Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2023-12-15
Publication date: 2025-11-05
Also published as: CN220327406U; AU2023420379A1; TWM660294U; JP2026506318A; WO2024140291A1; KR20250133359A

Abstract

A cleaning scrubber (200) and an automated cleaning device. The cleaning scrubber (200) comprises: a shaft rod (210), which has a first end portion (211) and a second end portion (212) that are axially opposed, at least one among the first end portion (211) and the second end portion (212) comprising a mating member (213); a scrubber component (230), the scrubber component (230) being coaxially sleeved at the periphery of the shaft rod (210); and an end component (220), which is configured to be matched and installed with the mating member (213), wherein an outside end face of the mating member (213) is closer to the center of the shaft rod (210) relative to an outside end surface of an end portion belonging to the mating member (213).

Description

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to Chinese Patent Application No. 202223604646.X filed on December 30, 2022 , which is incorporated herein by reference in its entirety as a part of the present application.

TECHNICAL FIELD

The present disclosure relates to the technical field of self-propelled devices, and in particular to a cleaning brush and an automatic cleaning device.

BACKGROUND

A cleaning brush is an important functional component of a cleaning device. The existing cleaning brush has a small end cover, an end portion of a shaft rod of the cleaning brush is long and exposed outside the end cover, and the end cover is located outside a cylindrical member sleeving an outer periphery of a shaft cover of the cleaning brush, such that a winding object wound around the cylindrical member is likely to be wound to the end portion of the shaft rod from an end portion of the cylindrical member. The end cover structure of the existing cleaning brush has a further problem that the winding object cannot be prevented from extending excessively towards the end portion of the cleaning brush, causing a motor output power end and a bearing end to be stuck by the winding object. In addition, there is still much room for improvement in a number of aspects, for example, the end cover structure of the cleaning brush, the mounting structure of the end cover structure and the shaft rod, and fool-proof mounting of end covers at two sides of the cleaning brush.
Therefore, it is necessary to provide a cleaning brush of an improved structure to solve the above problems.
It should be noted that the information disclosed in the above background section is only used for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art.

SUMMARY

Some embodiments of the present disclosure provide a cleaning brush. The cleaning brush includes:

a shaft rod having a first end portion and a second end portion opposite to each other in an axial direction, at least one of the first end portion and the second end portion including a fitting member;
a brush member, the brush member coaxially sleeving an outer periphery of the shaft rod; and
an end portion member configured to be mounted to the fitting member in a fitted manner,
where an outer side end surface of the fitting member is closer to a center of the shaft rod than an outer side end surface of an end portion at which the fitting member is located.

In some embodiments, the outer side end surface of the fitting member is closer to the center of the shaft rod than an outer end surface of a corresponding side of the brush member.
In some embodiments, an accommodating space is formed on an end surface, distal to the center of the shaft rod, of the end portion at which the fitting member is located, and a portion of the end portion member is inserted into the accommodating space to be mounted to the fitting member in a fitted manner.
In some embodiments, the outer end surface of the corresponding side of the brush member is flush with an opening portion of the accommodating space.
In some embodiments, an assembly structure is provided at a side of the end portion member distal to the fitting member, the end portion member further includes a guide rod, the guide rod is located at a side of the assembly structure proximal to the shaft rod, a leading portion is provided at an end portion of the guide rod distal to the assembly structure, and the leading portion is configured to form a rotational engagement structure with the fitting member.
In some embodiments, the leading portion spirally extends in a circumferential direction of the guide rod in a direction away from the assembly structure, and
the fitting member includes a fitting portion fitted with the shape of the leading portion, and the fitting portion is provided with spiral grooves for accommodating the leading portion.
In some embodiments, the end portion member further includes a guide shaft, the guide shaft extends from the guide rod away from the assembly structure, and a snap-fit member is provided at an end portion of the guide shaft distal to the guide rod; and
a snap-fit portion is provided at an end portion of the fitting member distal to the opening portion of the accommodating space, and the snap-fit portion and the snap-fit member form a snap-fit structure.
In some embodiments, a plurality of leading portions are provided, and the plurality of leading portions are evenly distributed in the circumferential direction of the guide rod.
In some embodiments, the end portion member includes a first side end portion member and a second side end portion member that are respectively mounted to the fitting members of the first end portion and the second end portion in a fitted manner; and
the leading portion of the first side end portion member and the leading portion of the second side end portion member are different in at least one of the shape, the number, and the size.
In some embodiments, the shape and size of the leading portion of the first side end portion member are the same as the shape and size of the leading portion of the second side end portion member, the number of the leading portions of the first side end portion member is greater than the number of the leading portions of the second side end portion member, and the number of the leading portions of the second side end portion member is not a divisor of the number of the leading portions of the first side end portion member.
In some embodiments, an end surface of the assembly structure of the first side end portion member distal to the guide rod is in a regular polygon shape, and the number of sides of the regular polygon is the same as the number of the leading portions of the first side end portion member.
In some embodiments, the brush member includes:

a cylindrical member sleeving the outer periphery of the shaft rod; and
a plurality of brush components extending from an outer surface of the cylindrical member in a direction away from the cylindrical member, the plurality of brush components being evenly arranged in a circumferential direction of the cylindrical member,
where the number of the leading portions of the first side end portion member is a divisor of the number of the brush components.

In some embodiments, the shaft rod is a rigid component, and the brush member directly sleeves the shaft rod.
In some embodiments, the shaft rod is a rigid component, and a rigid filler is filled between the brush member and the shaft rod.
In some embodiments, the end portion member further includes a blocking structure arranged between the assembly structure and the guide rod, so as to prevent a winding object from excessively extending away from the brush member.
Some embodiments of the present disclosure provide an automatic cleaning device. The automatic cleaning device includes the cleaning brush according to the foregoing embodiments.
The above solutions of the embodiments of the present disclosure may have the following beneficial effects.
In the cleaning brush of the present disclosure, the assembly structure of the end portion member extends into the accommodating space of the end portion of the shaft rod to be mounted to the fitting member in a fitted manner, such that the mounting simplicity of the end portion member can be further improved, and the stability of the mounting structure can be further improved. The assembly component is arranged inside the relatively hard shaft rod, so as to effectively protect the relatively fragile assembly component, and prevent structures in the assembly component from being damaged when the roller brush interferes with the ground for sweeping.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and are used in conjunction with the specification to explain the principles of the present disclosure. Apparently, the drawings in the following description are merely some embodiments of the present disclosure, and those of ordinary skill in the art may still derive other drawings from these drawings without creative efforts. In the drawings:

FIG. 1 is a schematic structural diagram of an automatic cleaning device according to an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of the automatic cleaning device in FIG. 1 in a bottom view;
FIG. 3 is an exploded view of a three-dimensional structure of an example of a cleaning brush according to the present disclosure;
FIG. 4 is a schematic cross-sectional view of the cleaning brush in FIG. 3;
FIG. 5 is a diagram of a three-dimensional structure of an example of an end portion member of the cleaning brush in FIG. 3;
FIG. 6 is a schematic diagram of a three-dimensional structure of an example of a fitting member of a shaft rod in FIG. 3;
FIG. 7 is a schematic diagram of a three-dimensional structure of an example of a guiding engagement structure of the end portion member and the fitting member of the shaft rod in FIG. 3;
FIG. 8 is a structural exploded view of the guiding engagement structure in FIG. 7;
FIG. 9 is a schematic exploded view of a three-dimensional structure of another example of a cleaning brush according to the present disclosure;
FIG. 10 is a partial structural exploded view of the cleaning brush in FIG. 9 from an angle; and
FIG. 11 is a partial structural exploded view of the cleaning brush in FIG. 9 from another angle.

DETAILED DESCRIPTION

For clearer descriptions of technical solutions and technical effects of the present disclosure, the present disclosure is further described in detail hereinafter with reference to the accompanying drawings. Apparently, the described embodiments are merely some embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.
The terms used in the embodiments of the present disclosure are for the purpose of describing particular embodiments only and are not intended to be limiting to the present disclosure. As used in the embodiments and the appended claims of the present disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality of" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely a way to describe an association relationship between associated objects, indicating that three possible relationships may exist. For example, "A and/or B" can represent: the existence of A alone, the simultaneous existence of A and B, and the existence of B alone. In addition, the character "/" herein generally indicates an "or" relationship between the associated objects before and after the "/".
It should be further noted that the terms "comprise", "comprising", "include", "including", or any other variation thereof, are intended to encompass a non-exclusive inclusion, such that a commodity or an apparatus including a list of elements includes not only those elements, but also other elements not explicitly listed or inherent to such commodity or apparatus. Without further limitation, an element defined by the phrase "comprising a/an..." or "including a/an..." does not exclude the presence of other identical elements in the commodity or apparatus including the element.
In order to further optimize the mounting structure of the end portion member and the end portion of the shaft rod and further optimize the stability of the mounting structure, the present disclosure provides a cleaning brush. By means of an outer guiding engagement structure formed by the guide rod of the end portion member and the shaft rod in combination with the snap-fit structure formed by the guide shaft and the fitting member, guided mounting can be performed more effectively, a more effective fool-proof mounting structure can be achieved, the mounting simplicity of the end portion member can be further improved, and the stability of the mounting structure can be further improved.
The cleaning brush of the present disclosure is widely applicable, particularly in an automatic cleaning device. The automatic cleaning device may be a self-mobile robot such as a mopping robot, a sweeping robot, a sweeping and mopping robot, or a large commercial floor scrubber. In this case, the automatic cleaning device operates on an operating surface, and the operating surface may be any operating surface, such as a floor, a tabletop, a roof, or a platform. The automatic cleaning device may also be a window cleaning robot, the self-propelled device operates on an outer surface of a glass of a building, and the glass serves as the operating surface. The automatic cleaning device may further be a pipeline self-mobile robot, the automatic cleaning device operates on an inner surface of a pipeline, and the inner surface of the pipeline serves as the operating surface. These are purely for the purpose of illustration.
It should be noted that in the present disclosure, the left side of the drawing page is taken as a first side, and the right side of the drawing page is taken as a second side. The upper side of the drawing page is taken as an upper side, and the lower side of the drawing page is taken as a lower side. The up-down direction of the drawing page is taken as a vertical direction, and the left-right direction of the drawing page is taken as a horizontal direction.
Optional embodiments of the present disclosure will be described in detail hereinafter with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an automatic cleaning device according to an exemplary embodiment, and FIG. 2 is a schematic structural diagram of the automatic cleaning device in FIG. 1 in a bottom view. As shown in FIGs. 1 and 2, the automatic cleaning device may be a robot vacuum cleaner, a mopping/scrubbing robot, a window cleaning robot, or the like. The automatic cleaning device may include a mobile platform 1000, a sensing system 2000, a control system (not shown), a driving system 3000, a power system (not shown), a human-machine interaction system 4000, and a cleaning module 5000.
The mobile platform 1000 may be configured to automatically move in a target direction on an operating surface. The operating surface may be a surface to be cleaned by the automatic cleaning device. In some embodiments, the automatic cleaning device may be a mopping robot, the automatic cleaning device operates on the ground, and the ground serves as the operating surface. The automatic cleaning device may also be a window cleaning robot, the automatic cleaning device operates on an outer surface of a glass of a building, and the glass serves as the operating surface. The automatic cleaning device may further be a pipeline cleaning robot, the automatic cleaning device operates on an inner surface of a pipeline, and the inner surface of the pipeline serves as the operating surface. For the purpose of illustration only, the following description in the present application is illustrated by taking a mopping robot as an example.
In some embodiments, the mobile platform 1000 may be an autonomous mobile platform or a non-autonomous mobile platform. The autonomous mobile platform means that the mobile platform 1000 itself can automatically and adaptively make an operational decision based on an unexpected environmental input; and the non-autonomous mobile platform itself cannot adaptively make an operational decision based on an unexpected environmental input, but can execute a given procedure or operate according to a certain logic. Correspondingly, when the mobile platform 1000 is an autonomous mobile platform, the target direction may be autonomously determined by the automatic cleaning device; and when the mobile platform 1000 is a non-autonomous mobile platform, the target direction may be set systematically or manually.
The sensing system 2000 includes sensing apparatuses such as a position determining apparatus (not shown) located above the mobile platform 1000, a buffer (not shown) located in a forward part of the mobile platform 1000, a cliff sensor (not shown) and an ultrasonic sensor (not shown) located at the bottom of the mobile platform, an infrared sensor (not shown), a magnetometer (not shown), an accelerometer (not shown), a gyroscope (not shown), and an odometer (not shown), to provide various position information and motion status information of the machine to the control system.
For convenience of description, directions are defined as follows: The automatic cleaning device may be calibrated by defining the following three axes perpendicular to one another: a transverse axis Y, a front-rear axis X, and a vertical axis Z. A direction to which an arrow along the front-rear axis X points is marked as "rearward", and a direction opposite to the direction of the arrow along the front-rear axis X is marked as "forward". The transverse axis Y is substantially in a width direction of the automatic cleaning device. A direction of an arrow along the transverse axis Y is marked as "leftward", and a direction opposite to the direction of the arrow along the transverse axis Y is marked as "rightward". The vertical axis Z is a direction extending upward from the bottom surface of the automatic cleaning device. As shown in FIG. 1, a direction along the front-rear axis X is defined as a second direction, where the second direction is, for example, a forward direction or a rearward direction; and a direction perpendicular to the second direction in a horizontal plane is defined as a first direction, where the first direction is, for example, a leftward direction or a rightward direction.
The control system (not shown) is arranged on a main circuit board in the mobile platform 1000, and includes a computing processor, such as a central processing unit or an application processor, that communicates with a non-transitory memory, such as a hard disk, a flash memory, or a random access memory. The application processor is configured to receive environmental information sensed by a plurality of sensors and transmitted from the sensing system, draw a real-time map of an environment in which the automatic cleaning device is located by using a positioning algorithm, such as SLAM based on obstacle information fed back by the position determining apparatus, etc., autonomously determine a travel path based on the environmental information and the environmental map, and then control the driving system 3000 to perform operations such as traveling forward, traveling rearward, and/or steering according to the autonomously determined travel path. Further, the control system may also determine whether to activate the cleaning module 5000 to perform a cleaning operation based on the environmental information and the environmental map.
The driving system 3000 may execute a driving command based on specific distance and angle information, for example, x, y, and θ components, to steer the automatic cleaning device to run across the ground. The driving system 3000 includes a driving wheel assembly. The driving system 3000 may simultaneously control a left wheel and a right wheel. To more precisely control the movement of the machine, the driving system 3000 preferably includes a left driving wheel assembly and a right driving wheel assembly. The left and right driving wheel assemblies are symmetrically disposed along a transverse axis defined by the mobile platform 1000. To enable the automatic cleaning device to move more stably on the ground or to achieve stronger mobility, the automatic cleaning device may include one or more steering assemblies. Each steering assembly may be either a driven wheel or a driving wheel, and may adopt structural forms including but not limited to a universal wheel. The steering assembly may be located in front of the driving wheel assembly.
The power system (not shown) includes a rechargeable battery, for example, a nickel-hydrogen battery and a lithium battery. The rechargeable battery may be connected to a charging control circuit, a battery pack charging temperature detection circuit, and a battery undervoltage monitoring circuit. The charging control circuit, the battery pack charging temperature detection circuit, and the battery undervoltage monitoring circuit are then connected to a single-chip microcomputer control circuit. The main machine is charged through connection to a charging pile via charging electrodes disposed on the side or bottom of the machine body.
The human-machine interaction system 4000 includes a button on a host panel for a user to select a function, and may further include a display screen and/or an indicator light and/or a speaker, where the display screen, the indicator light, and the speaker show a current state of the machine or function options to the user, and may further include a mobile phone client program. For a path navigation type cleaning device, a mobile phone client may show a map of an environment in which the device is located and a location of the machine to the user, providing the user with richer and more user-friendly function options.
As shown in FIG. 2, the cleaning module 5000 includes a dust box, a fan, and a main brush module. The main brush module sweeps the garbage on the ground to the front of a dust suction port between the main brush module and the dust box, and then the garbage is sucked into the dust box by the gas with suction generated by the fan and passing through the dust box. The dust removal capacity of the sweeper may be characterized by a dust pickup efficiency (DPU) of the garbage. The DPU is affected by a wind force utilization rate of an air duct formed by the dust suction port, the dust box, the fan, the air outlet, and connecting components among the four, and is affected by a type and power of the fan, thereby posing a complex system design problem. Compared with a conventional plug-in vacuum cleaner, the improvement in the dust removal capacity is more significant for an automatic cleaning device with limited energy. The improvement in the dust removal capacity directly and effectively reduces the energy requirements. That is, a machine that can sweep 80 square meters of the ground on a single charge can be evolved to sweep 180 square meters or more on a single charge. In addition, a service life of the battery with a reduced quantity of charging times is greatly increased, such that a frequency of replacing the battery by the user is also reduced. More visually and importantly, the improvement in the dust removal capacity is the most obvious and important user experience, and the user will directly draw a conclusion on whether the sweeping/wiping is thorough.
As shown in FIG. 2, the automatic cleaning device includes a mobile platform 1000. The mobile platform 1000 is configured to move freely on an operating surface, a cleaning module 5000 is provided at the bottom of the mobile platform 1000, and the cleaning module 5000 is configured to clean the operating surface. The cleaning module 5000 includes a drive unit, a roller brush framework, and roller brushes assembled in the roller brush framework. The drive unit provides a driving force for forward rotation or reverse rotation, and the driving force is applied to the roller brush through a multi-stage gear set. The roller brush rotates under the action of the driving force to clean the operating surface, or the roller brush rotates under the action of the driving force to collect dust.
As shown in FIG. 2, the roller brush framework is provided with a front cleaning brush mounting position 5211 and a rear cleaning brush mounting position 5212 for accommodating cleaning roller brushes. The front cleaning brush mounting position 5211 is provided with a first end 52111 and a second end 52112 opposite to the first end 52111. One end of the first roller brush 100 is engaged and fixed at the first end 52111, and the other end of the first roller brush is engaged and fixed at the second end 52112. In some embodiments, the front cleaning brush mounting position 5211 is a long-strip-shaped groove structure in the mobile platform, and the long-strip-shaped groove structure extends in the first direction. The rear cleaning brush mounting position 5212 is provided with a third end 52121 and a fourth end 52122 opposite to the third end 52121. In some embodiments, the rear cleaning brush mounting position 5212 has substantially the same structure as the front cleaning brush mounting position 5211. For example, the rear cleaning brush mounting position is also in a long-strip-shaped groove structure in the mobile platform, and the long-strip-shaped groove structure extends in the first direction. The second roller brush may be mounted in the long-strip-shaped groove of the rear cleaning brush mounting position 5212 through an opening of the long-strip-shaped groove structure. The two long-strip-shaped groove structures are parallel to each other in the second direction. The shape and size of the long-strip-shaped groove structure are not limited, as long as at least a portion of the first roller brush and at least a portion of the second roller brush are accommodated. The first end of the front cleaning brush mounting position 5211 and the third end of the rear cleaning brush mounting position 5212 are located at one side of the front-rear axis X, and the second end of the front cleaning brush mounting position 5211 and the fourth end of the rear cleaning brush mounting position 5212 are located at the other side of the front-rear axis X.
It should be noted that, in the following embodiments of the present disclosure, an example in which the long-strip-shaped groove structure proximal to the steering wheel on the automatic cleaning device is the front cleaning brush mounting position 5211 and the long-strip-shaped groove structure distal to the steering wheel is the rear cleaning brush mounting position 5212 is used for detailed description. Certainly, the reverse arrangement is also possible.
As shown in FIG. 2, in some embodiments, the automatic cleaning device includes two cleaning roller brushes. One cleaning roller brush is disposed at the front cleaning brush mounting position 5211 and regarded as a "front roller brush", and the other cleaning roller brush is disposed at the rear cleaning brush mounting position 5212 and regarded as a "rear roller brush". The front roller brush may be mounted in the front cleaning brush mounting position 5211 through the opening of the long-strip-shaped groove structure, and the rear roller brush may be mounted in the rear cleaning brush mounting position 5212 through the opening of the long-strip-shaped groove structure.
The cleaning brush in the present disclosure is illustrated hereinafter by using a roller brush, such as the rear roller brush, as an example.
FIG. 3 is an exploded view of a three-dimensional structure of an example of a cleaning brush according to the present disclosure. FIG. 4 is a schematic cross-sectional view of the cleaning brush in FIG. 3. FIG. 5 is a diagram of a three-dimensional structure of an example of an end portion member of the cleaning brush in FIG. 3. FIG. 6 is a schematic diagram of a three-dimensional structure of an example of a fitting member of the shaft rod in FIG. 3. FIG. 7 is a schematic diagram of a three-dimensional structure of an example of a guiding engagement structure of the end portion member and the fitting member of the shaft rod in FIG. 3. FIG. 8 is a structural exploded view of the guiding engagement structure in FIG. 7.
Referring to FIGs. 3 to 8, the cleaning brush 200 includes: a shaft rod 210 having a first end portion 211 and a second end portion 212 opposite to each other in an axial direction, at least one of the first end portion 211 and the second end portion 212 including a fitting member 213; a brush member 230, the brush member 230 coaxially sleeving an outer periphery of the shaft rod 210; and an end portion member 220 configured to be mounted to the fitting member 213 in a fitted manner, an assembly structure 221 being provided at a side of the end portion member 220 distal to the fitting member 213.
Specifically, the assembly structure 221 includes, for example, a bearing structure 221" and a transmission structure 221'. When the end portion member 220 is an end portion member located at the driving side, that is, when the end portion member 220 is a first side end portion member 220' connected to the drive unit of the cleaning module, the assembly structure 221 is, for example, the transmission structure 221'. When the end portion member 220 is an end portion member located at the driven side, that is, when the end portion member 220 is a second side end portion member 220" opposite to the first side end portion member 220', the assembly structure 221 is, for example, the bearing structure 221".
The connection and assembly relationship between the end portion member and the shaft rod is mainly described below by using the end portion member at the driving side as an example, and the connection relationship between the end portion member at the driven side and the shaft rod is similar.
As shown in FIG. 4, an outer side end surface of the fitting member 213 is located within an outer side end surface of an end portion at which the fitting member is located, for example, the first end portion 211. That is, the outer side end surface of the fitting member 213 is closer to the center of the shaft rod than an outer end surface of a corresponding side of the brush member 230. The outer side end surface used herein refers to an end surface that is distal to the center of the shaft rod on the axis of the shaft rod 210.
In some embodiments, as shown in FIG. 4, the outer side end surface of the fitting member 213 is located within the outer end surface of the corresponding side of the brush member 230. That is, the outer side end surface of the fitting member 213 is closer to the center of the shaft rod than the outer end surface of the corresponding side of the brush member 230.
As shown in FIG. 4, an accommodating space 214 is formed on an end surface, facing the end portion member 220, of an end portion where the fitting member 213 is located, and a portion of the end portion member 220 is inserted into the accommodating space 214 to be mounted to the fitting member 213 in a fitted manner.
In some embodiments, the fitting member 213 and the shaft rod 210 are formed as an integrated structure, and an outer end surface of the structure serves as a portion of a cavity wall of the accommodating space 214.
In some embodiments, the fitting member 213 is a detachable component, which is separated from the shaft rod 210 and accommodated and fixed in the accommodating space 214.
Specifically, an end surface of the fitting member 213 proximal to the assembly structure 221 is farther away from the assembly structure 221 relative to an opening portion 2141 of the accommodating space 214, which is specifically shown in FIG. 4.
Optionally, an end surface of the brush member 230 proximal to the assembly structure 221 is flush with the opening portion 2141 of the accommodating space 214, which is specifically shown in FIG. 4. On the one hand, the end portion of the brush member is effectively supported, maintaining a required strength when sweeping the ground; on the other hand, the brush member can effectively protect the core rod and the internal fitting member and other three-dimensional mounting and engagement structures, so as to prevent user experience from being impaired due to impact damage.
As shown in FIG. 5, the end portion member 220 includes a guide rod 222. The guide rod 222 is located at a side of the assembly structure 221 proximal to the shaft rod 210. A leading portion 2221 is provided at an end portion of the guide rod 222 distal to the assembly structure 221, and the leading portion 2221 is configured to form a rotational engagement structure with the fitting member 213.
Specifically, the leading portion 2221 spirally extends in a circumferential direction of the guide rod 222 in a direction away from the assembly structure 221. The leading portion 2221 is configured in a spiral shape with a rotation direction, and is specifically in a spiral shape spirally extending (i.e., spirally extending in a rotating manner) along the outer peripheral surface of the guide rod 222, such that the leading portion 2221 has a rotation direction, for example, a clockwise (or counterclockwise) rotation direction around the axis of the shaft rod 210.
Referring to FIGs. 4 and 5, the end portion member 220 includes a guide rod 222 and at least one leading portion 2221. The leading portion 2221 is disposed on an outer peripheral surface of the guide rod 222, and the plurality of leading portions 2221 are evenly distributed in a circumferential direction of the guide rod 222, such that the leading portions 2221 and the fitting member 213 form a rotational engagement structure, as shown in FIGs. 4 and 7.
In the example of FIG. 5, the leading portions 2221 are formed by etching grooves into the outer peripheral surface of the guide rod 222 to form protruding parts. The leading portions 2221 are formed at an end portion of the guide rod 222 distal to the assembly structure 221.
Specifically, a plurality of leading portions 2221 are provided. In the example of FIG. 5, the number of the leading portions 2221 is five, and the five leading portions 2221 are of the same size.
It should be noted that, in other examples, the number of the leading portions may also be three, four, six, or more, and the sizes of the leading portions may also be different. The above descriptions are only optional examples for illustration and should not be construed as limiting the present disclosure. In addition, for the formation of the leading portions, the leading portions may also be grooves formed by etching inward from the outer peripheral surface of the guide rod. The above descriptions are only optional examples for illustration and should not be construed as limiting the present disclosure. Optionally, the leading portions 211 are different in at least one of the shape, the number, and the size.
Further, the end portion member 220 further includes a guide shaft 223. The guide shaft 223 extends from the guide rod 222 away from the assembly structure 221, and a snap-fit member 2231 is provided at an end portion of the guide shaft 223 distal to the guide rod 222.
In this embodiment, an end of the guide shaft 223 proximal to the assembly structure 221 is sleeved in the guide rod 222.
Specifically, the guide shaft 223 includes the snap-fit member 2231 arranged along the outer peripheral surface. The snap-fit member 2231 is, for example, an annular groove, such that the snap-fit member 2231 and the fitting member 213 form a snap-fit structure.
As shown in FIG. 6, the fitting member 213 includes a fitting portion 2131 fitted with the shape of the leading portion 2221, and the fitting portion 2131 is provided with spiral grooves for accommodating the leading portion 2221.
Specifically, the fitting member 213 includes a main body portion 2130. The main body portion 2130 has a cavity. The main body portion 2130 includes a fitting portion 2131 disposed in the cavity. The fitting portion 2131 includes spiral grooves extending along an inner wall of the cavity. The fitting portion 2131 and the leading portion 2221 form a rotational engagement structure, such that the guide rod of the end portion member and the fitting member form a rotational engagement mechanism, which is specifically shown in FIG. 7.
In this example, the number of the fitting portions 311 is the same as the number of the leading portions 211, for example, both being five.
It should be noted that for the shape of the fitting portion, in other examples, the fitting portion may also be a groove, and the leading portion may be a protruding part. In other examples, the number of the fitting portions may also be three, four, six, or more, as long as the number of the leading portions is the same as the number of the fitting portions. The above descriptions are only optional examples for illustration and should not be construed as limiting the present disclosure.
By adding the leading portion to the outer peripheral surface of the guide rod, the guide rod of the end portion member and the fitting member of the shaft rod form a rotational engagement structure, such that guided mounting can be performed effectively, an effective fool-proof mounting structure can be achieved, the mounting simplicity of the end portion member can be improved, and the stability of the mounting structure can be improved. By means of the rotational engagement structure formed by the guide rod of the end portion member and the fitting member inside the shaft rod in combination with the snap-fit structure formed by the guide shaft and the fitting member, guided mounting can be performed more effectively, a more effective fool-proof mounting structure can be achieved, the mounting simplicity of the end portion member can be further improved, and the stability of the mounting structure can be further improved.
In the example of FIG. 6, the fitting member 213 includes an extension portion 2132 connected to the main body portion 2130 and extending outward from the main body portion 2130. The extension portion 2132 is closer to the center of the shaft rod 210 than the main body portion 2130, and an outer diameter of the extension portion 2132 is smaller than an outer diameter of the main body portion 2130.
As shown in FIGs. 7 and 8, the outer peripheral surface of the extension portion 2132 is provided with a plurality of evenly distributed arrises 21321, such that the outer peripheral surface of the extension portion 2132 forms a concave-convex surface for forming a corresponding engagement structure with the interior of the shaft rod 210 (i.e., the shape of the interior of the shaft rod), so as to increase the contact area between the fitting member 213 and the interior of the shaft rod 210, which is more conducive to bonding the fitting member 213 into the accommodating space 214 of the shaft rod 210, thereby increasing the bonding strength of the bonding structure between the fitting member 213 and the shaft rod 210, and enabling the mounting to be more stable.
It should be noted that the bonding structure between the fitting member 213 and the interior of the shaft rod 210 may also be a stepped engagement structure or the like. In other embodiments, the whole or at least a portion of the assembly of the fitting member 213 may be integrally formed with the shaft rod 210. The above descriptions are only optional examples for illustration and should not be construed as limiting the present disclosure.
As shown in FIG. 7, a snap-fit portion 21322 is provided at an end portion of the fitting member 213 proximal to the center side of the shaft rod, and the snap-fit portion 21322 is closer to the center side of the shaft rod than the arris 21321. The snap-fit portion 21322 is, for example, a claw portion, and the snap-fit portion 21322 and the snap-fit member 2231 (i.e., the annular groove portion) of the guide shaft 223 of the end portion member 220 form a snap-fit structure.
In the example of FIG. 3, the end portion member 220 is provided with a blocking structure 225 for preventing the winding object from excessively extending away from the cleaning brush. The blocking structure 225 is arranged at a side closer to the assembly structure 221 than the guide rod 210 (i.e., a side distal to the center side of the shaft rod).
Specifically, an outer diameter of the blocking structure 225 is larger than an outer diameter of the guide rod 210, and the blocking structure 225 is spaced apart from the first end portion 211 of the shaft rod 210 by a certain distance, as shown in FIGs. 7 and 8.
By providing the blocking structure on the end portion member, the winding object is directly wound around the blocking structure of the end portion member, such that the winding object can be effectively prevented from being wound around the shaft rod.
In another example, in the cleaning brush 200 shown in FIG. 9, the end portion member 220 includes a first side end portion member 220' and a second side end portion member 220", which are respectively mounted to the fitting members 213 of the first end portion 211 and the second end portion 212 of the shaft rod 210 in a fitted manner. The shaft rod 210 is a rigid component, the brush member 230 directly sleeves the shaft rod 210, and the cleaning brush 200 is, for example, a hard brush. Optionally, the shaft rod 210 is a rigid component, and a rigid filler is filled between the brush member 230 and the shaft rod 210.
In this example, the first leading portion 2221' of the first side end portion member 220' (i.e., the end portion member 220 in FIG. 4) and the second leading portion 2221" of the second side end portion member 220" are different in at least one of the shape, the number, and the size.
In an optional embodiment, the shape and size of the first leading portion 2221' of the first side end portion member 220' are the same as the shape and size of the second leading portion 2221" of the second side end portion member 220". The number of the first leading portions 2221' of the first side end portion member 220' is greater than the number of the second leading portions 2221" of the second side end portion member 220", and the number of the second leading portions 2221" of the second side end portion member 220" is not a divisor of the number of the first leading portions 2221' of the first side end portion member 220'. For example, the number of the first leading portions 2221' of the first side end portion member 220' is five, and the number of the second leading portions 2221" of the second side end portion member 220" is two.
As shown in FIGs. 9 and 10, the first side end portion member 220' (i.e., the end portion member 220 located at the driving side, or the left side end portion shown in FIG. 10) is mounted to the first end portion 210 of the shaft rod 210. The first side end portion member 220' includes a transmission structure 221'. The transmission structure 221' is closer to the outside than the first blocking structure 225', and an end surface of the transmission structure 221' is in a polygon shape, for example, a regular polygon. The transmission mechanism 221' is connected to the driving mechanism of the automatic cleaning device.
In this example, the brush member 230 includes: a cylindrical member sleeving an outer periphery of the shaft rod; and a plurality of brush components 232 extending from an outer surface of the cylindrical member in a direction away from the cylindrical member 231. The plurality of brush components 232 are evenly arranged in a circumferential direction of the cylindrical member.
It should be noted that, in this example, the brush components 232 include first brush components of at least one size, for example, five sets of brush components. Each set of brush components includes first brush components of two sizes. For example, the first brush components are V-shaped or spiral-shaped. Since the brush member 230 in this example is substantially the same as the brush member 230 in the example of FIG. 3, the description of the same parts is omitted.
Specifically, the number of the first leading portions 2221' of the first side end portion member 220' is a divisor of the number of the brush components 232. For example, if the number of the first leading portions 2221' is five, the number of sets of the brush components 232 is a multiple of five, for example, five sets or ten sets, where each set includes two or more brush components.
By setting the number of the first leading portions 2221' to be a divisor of the number of sets of the brush components 232, the brush components 232 are enabled to have a specific mounting angle when the roller brushes are assembled into the roller brush framework, facilitating matching and interference of corresponding brush components of the two roller brushes.
In the example of FIG. 9, the number of the first leading portions 2221' is five, and the number of sets of the brush components 232 is five.
As shown in FIG. 10, the second side end portion member 220" is mounted to the second end portion 212 of the shaft rod 210 (i.e., the end portion member located at the driven side, or the right side end portion shown in FIG. 10). The second side end portion member 220" includes an assembly structure (specifically, a bearing structure 221"). The bearing structure 221" is rotatable relative to the shaft rod 210, and is connected to other structures (for example, the machine body) of the cleaning device through rotation of the bearing structure 221" relative to the shaft rod.
Specifically, the first side end portion member 220' is mounted to the first fitting member 213' of the first end portion 211 inside the shaft rod 210, and the second side end portion member 220" is mounted to the second fitting member 213" of the second end portion 212 inside the shaft rod 210.
It should be noted that since the structures of the shaft rod and the brush member in the example of FIG. 8 are substantially the same as the structures of the shaft rod and the brush member in the example of FIG. 3, the description of the same parts is omitted. In addition, since the structure of the first fitting member 213' in FIG. 9 is substantially the same as the structure of the fitting member 213 in FIG. 6, the description of the same parts is omitted.
In the example of FIG. 9, the first side end portion member 220' includes a first guide rod 222', at least one first leading portion 2221', and a first guide shaft 223'. The first guide rod 222' is provided with a plurality of first leading portions 2221'. The first leading portions 2221' are formed by etching grooves into an outer peripheral surface of the first guide rod 222' to form protruding parts. The first leading portion 2221' is formed at an end portion of the first guide rod 222' distal to the assembly structure 221'.
As shown in FIGs. 10 and 11, the second side end portion member 220" includes a second guide rod 222", at least one second leading portion 2221", and a second guide shaft 223". The second guide rod 222" is provided with a plurality of second leading portions 2221".
Optionally, when the shape of the first leading portion 2221' of the first side end portion member 220' is the same as the shape of the second leading portion 2221" of the second side end portion member 220", the number of the first leading portions 2221' of the first side end portion member 220' is different from the number of the second leading portions 2221" of the second side end portion member 220".
Optionally, the number of the first leading portions 2221' of the first side end portion member 220' is odd, and the number of the second leading portions 2221" of the second side end portion member 220" is even. Preferably, the number of the first leading portions 2221' of the first side end portion member 220' and the number of the second leading portions 2221" of the second side end portion member 220" are not divisors for each other, so as to ensure that the side end portion member with less leading portions cannot be mounted to the fitting member corresponding to the side end portion member with more leading portions by mistake, thereby ensuring that any side end portion member will not be mounted by mistake and achieving maximum fool-proofness.
As shown in FIGs. 10 and 11, the second end portion 212 of the shaft rod 210 includes a second fitting member 213" matching a second leading portion 2221" of the second guide rod 222". The number of the second leading portions 2221 " is two. The second leading portions 2221 " are formed by etching grooves into an outer peripheral surface of the second guide rod 222" to form protruding parts, and are arranged at an end portion of the second guide rod 222" distal to the bearing structure 221".
Specifically, the second fitting member 213" includes an extension portion 2132" connected to a main body portion 2130" and extending outward from the main body portion 2130". An outer diameter of the main body portion 2130" is larger than an outer diameter of the extension portion 2132". The main body portion 2130" includes a cavity. The main body portion 2130" includes a fitting portion 2131" disposed in the cavity. The fitting portion 2131" includes spiral grooves extending along an inner wall of the cavity. The fitting portion 2131" and the second leading portion 2221" form a rotational engagement structure, such that the guide rod of the second side end portion member and the fitting member form a rotational engagement mechanism.
As shown in FIGs. 10 and 11, the outer peripheral surface of the extension portion 2132" of the second fitting member 213" is provided with a plurality of evenly distributed arrises 21321", such that the outer peripheral surface of the extension portion 2132" forms a concave-convex surface for forming a corresponding engagement structure with the interior of the shaft rod 210 (i.e., the shape of the interior of the shaft rod), so as to increase the contact area between the second fitting member 213" and the interior of the shaft rod 210, which is more conducive to bonding the second fitting member 213" into the accommodating space of the shaft rod 210, thereby increasing the bonding strength of the bonding structure between the second fitting member 213" and the shaft rod 210, and enabling the mounting to be more stable.
Further, a snap-fit portion 21322" is provided at an end portion of the second fitting member 213" proximal to the center side of the shaft rod, and the snap-fit portion 21322" is closer to the center side of the shaft rod than the arris 21321". The snap-fit portion 21322" is, for example, a claw portion, and the snap-fit portion 21322" and the snap-fit member 2231 (i.e., the annular groove portion) of the guide shaft 223 of the second side end portion member 220" form a snap-fit structure.
In the example of FIG. 9, the first side end portion member 220' includes an assembly structure (specifically, a transmission structure 221') and a first guide shaft 223'. One end of the first guide shaft 223' is sleeved in the first guide rod 222', the other end of the first guide shaft 223' sleeves a first guide hole of the first end portion 211', and the first guide hole is coaxially formed on an end surface of the first end portion 211'.
The assembly structure 221" and the second guide rod 222" of the second side end portion member 220" are split-type structures. Specifically, one end of the second guide shaft 223" passes through the assembly structure (specifically, the bearing structure 221") of the second side end portion member 220", the other end of the second guide shaft 223" sleeves a second guide hole of the second end portion 212, and the second guide hole is coaxially formed on an end surface of the first end portion 211.
Optionally, the first side end portion member 220' is provided with a blocking structure 225'. The blocking structure is specifically disposed between the assembly structure (specifically, the transmission structure 221') and the first guide rod 222'. The second side end portion member 220" is provided with a blocking structure 225". The blocking structure is specifically disposed between the assembly structure (specifically, the bearing structure 221") and the second guide rod 222". The blocking structures on the end portion members at two sides are both used to prevent the winding object from excessively extending away from the brush member 230.
In this example, the end surface at the outer end of the first side end portion member 220' is configured in the shape of a first polygon corresponding to the number of the brush components 232. Specifically, the end surface of the transmission structure 221' of the first side end portion member 220' distal to the guide rod 222 is in a regular polygon shape, and the number of sides of the regular polygon is the same as the number of the first leading portions 2221' of the first side end portion member 220'. Meanwhile, the number of the first leading portions 2221' of the first side end portion member 220' is a divisor of the number of the brush components 232.
In this way, when the roller brush is mounted to the roller brush framework, the brush component 232 may have a specific mounting angle. When a plurality of roller brushes with similar structures are provided, this design is very advantageous for forming a fitting relationship between the blades of the plurality of roller brushes. In particular, when the blades of two roller brushes need to be aligned, the blades can be ensured to be aligned to achieve synchronous operation, interference, or staggering according to a certain posture, thereby meeting different sweeping effect requirements.
Compared with the prior art, in the cleaning brush of the present disclosure, by means of the rotational engagement structure formed by the leading portion of the guide rod of the end portion member and the fitting member inside the shaft rod in combination with the snap-fit structure formed by the guide shaft and the fitting member, guided mounting can be performed more effectively, a more effective fool-proof mounting structure can be achieved, the mounting simplicity of the end portion member can be further improved, and the stability of the mounting structure can be further improved.
In addition, by providing the blocking structure on the end portion member, the winding object is directly wound around the blocking structure of the end portion member, such that the winding object can be effectively prevented from being wound around the shaft rod.
The present disclosure further provides another embodiment following the above embodiments. The embodiment of the present disclosure further provides an automatic cleaning device. The automatic cleaning device includes the cleaning brush according to the foregoing embodiments. Interpretations based on the same name meanings are the same as those in the foregoing embodiments, and have the same technical effects as those in the foregoing embodiments, which are not repeated herein.
Finally, it should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and reference should be made to each other for the same or similar parts. Since the system or apparatus disclosed in the embodiment corresponds to the method disclosed in the embodiment, the description is relatively simple, and reference may be made to the description of the method part.
The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for 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 in the embodiments of the present disclosure.

Claims

A cleaning brush, comprising:
a shaft rod having a first end portion and a second end portion opposite to each other in an axial direction, at least one of the first end portion and the second end portion comprising a fitting member;

a brush member, the brush member coaxially sleeving an outer periphery of the shaft rod; and

an end portion member configured to be mounted to the fitting member in a fitted manner,

wherein an outer side end surface of the fitting member is closer to a center of the shaft rod than an outer side end surface of an end portion at which the fitting member is located.
The cleaning brush according to claim 1, wherein the outer side end surface of the fitting member is closer to the center of the shaft rod than an outer end surface of a corresponding side of the brush member.
The cleaning brush according to claim 1, wherein an accommodating space is formed on an end surface, distal to the center of the shaft rod, of the end portion at which the fitting member is located, and a portion of the end portion member is inserted into the accommodating space to be mounted to the fitting member in a fitted manner.
The cleaning brush according to claim 3, wherein
an outer end surface of a corresponding side of the brush member is flush with an opening portion of the accommodating space.
The cleaning brush according to any one of claims 1 to 4, wherein
an assembly structure is provided at a side of the end portion member distal to the fitting member, the end portion member further comprises a guide rod, the guide rod is located at a side of the assembly structure proximal to the shaft rod, a leading portion is provided at an end portion of the guide rod distal to the assembly structure, and the leading portion is configured to form a rotational engagement structure with the fitting member.
The cleaning brush according to claim 5, wherein
the leading portion spirally extends in a circumferential direction of the guide rod in a direction away from the assembly structure, and

the fitting member comprises a fitting portion fitted with the shape of the leading portion, and the fitting portion is provided with spiral grooves for accommodating the leading portion.
The cleaning brush according to claim 5, wherein
the end portion member further comprises a guide shaft, the guide shaft extends from the guide rod away from the assembly structure, and a snap-fit member is provided at an end portion of the guide shaft distal to the guide rod; and

a snap-fit portion is provided at an end portion of the fitting member distal to the opening portion of the accommodating space, and the snap-fit portion and the snap-fit member form a snap-fit structure.
The cleaning brush according to claim 5, wherein
a plurality of leading portions are provided, and the plurality of leading portions are evenly distributed in a circumferential direction of the guide rod.
The cleaning brush according to claim 7, wherein
the end portion member comprises a first side end portion member and a second side end portion member that are respectively mounted to the fitting members of the first end portion and the second end portion in a fitted manner; and

the leading portion of the first side end portion member and the leading portion of the second side end portion member are different in at least one of shape, number, and size.
The cleaning brush according to claim 9, wherein
the shape and size of the leading portion of the first side end portion member are the same as the shape and size of the leading portion of the second side end portion member, the number of the leading portions of the first side end portion member is greater than the number of the leading portions of the second side end portion member, and the number of the leading portions of the second side end portion member is not a divisor of the number of the leading portions of the first side end portion member.
The cleaning brush according to claim 9, wherein an end surface of the assembly structure of the first side end portion member distal to the guide rod is in a regular polygon shape, and the number of sides of the regular polygon is the same as the number of the leading portions of the first side end portion member.
The cleaning brush according to claim 9, wherein the brush member comprises:
a cylindrical member sleeving the outer periphery of the shaft rod; and

a plurality of brush components extending from an outer surface of the cylindrical member in a direction away from the cylindrical member, the plurality of brush components being evenly arranged in a circumferential direction of the cylindrical member,

wherein the number of the leading portions of the first side end portion member is a divisor of the number of the brush components.
The cleaning brush according to any one of claims 1 to 4, wherein the shaft rod is a rigid component, and the brush member directly sleeves the shaft rod.
The cleaning brush according to any one of claims 1 to 4, wherein the shaft rod is a rigid component, and a rigid filler is filled between the brush member and the shaft rod.
The cleaning brush according to claim 5, wherein
the end portion member further comprises a blocking structure arranged between the assembly structure and the guide rod, so as to prevent a winding object from excessively extending away from the brush member.
An automatic cleaning device, comprising the cleaning brush according to any one of claims 1 to 15.