Cleaning heads and cleaning equipment

Abstract

This utility model discloses a cleaning head and a cleaning device, relating to the field of cleaning equipment technology. The cleaning head includes a housing, a first roller brush, and a second roller brush. The housing has a suction duct and an air inlet and an air outlet connected to the suction duct. The first and second roller brushes are rotatably installed inside the housing. The second roller brush is used to clean or collect dirt on the first roller brush. The first and second roller brushes are at least partially located inside the suction duct. Compared to the first roller brush, the second roller brush is positioned closer to the air outlet. By using the second roller brush to clean or collect hair on the first roller brush, the user does not need to manually clean it frequently, reducing the frequency of manual cleaning. By positioning the second roller brush closer to the air outlet, it can not only clean the first roller brush in real time during the cleaning process, but also quickly expel the cleaned hair and other dirt with the help of the airflow in the suction duct, avoiding secondary pollution or blockage.

Description

[0001] Priority information

[0002] This application claims priority to Chinese invention patent application No. 202510703216.2, filed on May 28, 2025, entitled "Cleaning Head and Cleaning Equipment"; Chinese utility model patent application No. 202521077219.1, entitled "Cleaning Head and Cleaning Equipment"; and Chinese utility model patent application No. 202521077208.3, entitled "Cleaning Head and Cleaning Equipment," the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of cleaning equipment technology, and in particular to a cleaning head and a cleaning device. Background Technology

[0004] As people's living standards continue to improve, more and more families are using cleaning equipment for daily cleaning. These devices typically have a roller brush at the suction port to enhance floor cleaning. However, in actual use, because the roller brush is in direct contact with the floor, it is very easy for fibrous materials such as hair to become entangled. When a large amount of hair is wrapped around the roller brush, it not only reduces the suction efficiency of the cleaning equipment but may also obstruct the roller brush's rotation, leading to motor stalling, affecting the normal operation of the equipment and shortening its lifespan. Currently, users mainly rely on manually removing the entangled material from the roller brush, which is not only time-consuming and laborious but also causes considerable inconvenience. Utility Model Content

[0005] The main purpose of this invention is to provide a cleaning head and cleaning device that aims to solve the problem that existing roller brushes are prone to getting tangled with hair and that the hair is difficult to clean.

[0006] To achieve the above objectives, the cleaning head proposed in this utility model includes:

[0007] The housing has a dust suction duct, and an air inlet and an air outlet connected to the dust suction duct;

[0008] A first roller brush is rotatably mounted within the housing; and,

[0009] The second roller brush is installed inside the housing and is used to clean or collect dirt from the first roller brush;

[0010] The first roller brush and the second roller brush are at least partially located within the dust extraction duct, with the second roller brush positioned closer to the air outlet than the first roller brush.

[0011] Optionally, the housing has a receiving cavity that communicates with the dust extraction duct, and both the first roller brush and the second roller brush are located within the receiving cavity.

[0012] Optionally, the inner wall of the receiving cavity is adapted to fit the outer contours of the first and second roller brushes.

[0013] Optionally, the air inlet is located at the bottom of the housing, and the air outlet is located at the top or rear of the housing.

[0014] Optionally, the air outlet is located at the rear of the housing;

[0015] The second roller brush is located behind the first roller brush.

[0016] Optionally, the second roller brush is at least partially offset from the air outlet.

[0017] Optionally, the second roller brush is located above the axis of the air outlet.

[0018] Optionally, the first roller brush is at least partially exposed at the air inlet to contact the surface to be cleaned, and the second roller brush is configured to be spaced apart from the surface to be cleaned.

[0019] Optionally, the second roller brush is rotatably mounted within the housing;

[0020] The cleaning head also includes a first drive motor and a transmission mechanism. The transmission mechanism is connected to the first drive motor and the first and second roller brushes to drive the first and second roller brushes to rotate, respectively.

[0021] Optionally, the first drive motor has a first output shaft and a second output shaft arranged opposite to each other, and both the first output shaft and the second output shaft are rotatably arranged about a rotation axis extending left and right.

[0022] The transmission mechanism includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism is connected to the first output shaft and the first roller brush to drive the first roller brush to rotate.

[0023] The second transmission mechanism is connected to the second output shaft and the second roller brush to drive the second roller brush to rotate.

[0024] Optionally, both the first roller brush and the second roller brush extend in the left-right direction and are arranged side by side;

[0025] The first drive motor is embedded inside the first roller brush, and the first output shaft is located inside the first roller brush and is connected to the inner wall of the first roller brush through the first transmission mechanism.

[0026] The second output shaft is exposed outside the first roller brush and is connected to the second roller brush through the second transmission mechanism.

[0027] Optionally, the cleaning head further includes a cutting structure disposed in the suction duct, the cutting structure being used to cut hair wrapped around the second roller brush.

[0028] Optionally, the cutting structure includes two stacked cutting portions, each extending along the axial direction of the second roller brush. The two cutting portions are movably arranged relative to each other in the axial and / or radial directions of the second roller brush to cut hair wrapped around the second roller brush.

[0029] Optionally, a third transmission mechanism is provided between the second roller brush and the two cutting sections, the third transmission mechanism being used to convert the rotational stroke of the second roller brush into the shearing stroke of the two cutting sections moving relative to each other.

[0030] This utility model also proposes a cleaning device, which includes the cleaning head described above.

[0031] The technical solution provided by this utility model has the following advantages:

[0032] By setting a second roller brush to clean or collect hair from the first roller brush, the cleaning equipment achieves self-cleaning capability during operation without the need for frequent manual cleaning by the user. This reduces the frequency of manual cleaning of the roller brush by the user. By placing the second roller brush closer to the air outlet, it can not only clean the first roller brush in real time during the cleaning process, but also use the airflow in the suction duct to quickly expel the cleaned hair and other dirt, avoiding secondary pollution or blockage problems. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 and Figure 2 A schematic diagram of the structure of an embodiment of the cleaning head provided by this utility model;

[0035] Figure 3 for Figure 1 An exploded diagram of the second roller brush;

[0036] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0037] Figure 5 for Figure 3 A partial structural diagram of the second roller brush;

[0038] Figure 6 for Figure 5 A magnified view of a section at point B in the middle;

[0039] Figure 7 for Figure 1 A partial structural diagram of the cleaning head;

[0040] Figure 8 for Figure 1 A plan view of the cleaning head;

[0041] Figure 9 for Figure 8 A cross-sectional view of CC.

[0042] Figure 10 and Figure 11 A schematic diagram of another embodiment of the cleaning head provided by this utility model;

[0043] Figure 12 for Figure 10 A partial structural diagram of the internal structure of the cleaning head;

[0044] Figure 13 for Figure 12 A schematic diagram of the structure of the second roller brush, the first drive motor, and the transmission mechanism;

[0045] Figure 14 for Figure 10 A plan view of the cleaning head;

[0046] Figure 15 for Figure 14 A cross-sectional view of DD.

[0047] Explanation of icon numbers:

[0048] 100. Cleaning head; 1. Housing; a. Suction duct; 1a. Receiving cavity; 1b. Air inlet; 1c. Air outlet; 2. First roller brush; 3. Second roller brush; 31. Brush bristles; 32. Base; 4. Cutting structure; 41. Cutting part; 5. Third transmission mechanism; 51. Sliding part; 51a. Guide groove; 6. Mounting shaft; 61. Guide part; 7. Bearing; 8. First drive motor; 81. First output shaft; 82. Second output shaft; 9. Transmission mechanism; 91. First transmission mechanism; 92. Second transmission mechanism.

[0049] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0051] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0052] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0053] This utility model provides a cleaning head suitable for cleaning floors, tabletops, and beds. The cleaning head can be applied to household cleaning equipment such as vacuum cleaners, sweepers, floor scrubbers, mite removers, fabric cleaners, carpet cleaners, pet hair removers, and handheld multi-functional cleaners. For ease of explanation, the specific structure of the cleaning head will be described below using its application in cleaning equipment as an example; other equipment can be adapted accordingly.

[0054] Please see Figure 1 , Figure 2 , Figure 14 and Figure 15In some embodiments of this utility model, the cleaning head 100 includes a housing 1, a first roller brush 2, and a second roller brush 3. The housing 1 has a suction duct a, and an air inlet 1b and an air outlet 1c connected to the suction duct a. The first roller brush 2 is rotatably installed inside the housing 1. The second roller brush 3 is installed inside the housing 1 and is used to clean or collect dirt on the first roller brush 2. The first roller brush 2 and the second roller brush 3 are at least partially located inside the suction duct a, and the second roller brush 3 is located closer to the air outlet 1c than the first roller brush 2.

[0055] Understandably, the housing 1 contains a suction duct a, with an air inlet 1b at one end and an air outlet 1c at the other, which are interconnected to form a complete airflow channel. When the cleaning head 100 is connected to the vacuuming system of the cleaning equipment, air enters the suction duct a from the air inlet 1b and is discharged through the air outlet 1c, thereby drawing dust, particles, and other debris from the ground into the cleaning head 100 and transporting them to the dust collection device.

[0056] The first roller brush 2 is rotatably mounted inside the housing 1. Its surface is typically provided with bristles 31 or other cleaning materials for direct contact with the ground and sweeping the ground. During rotation, centrifugal force assists in conveying dirt (such as dust, hair, and fine particles) adsorbed or adhered to the ground into the suction duct a, so that it can be carried away by airflow. The first roller brush 2 is at least partially located inside the suction duct a to ensure that it can effectively participate in the cleaning and vacuuming process.

[0057] The second roller brush 3 is installed inside the housing 1, and its position is closer to the air outlet 1c than that of the first roller brush 2. The main function of the second roller brush 3 is to clean or collect dirt on the surface of the first roller brush 2, especially for long foreign objects such as hair and fibers that may accumulate on the first roller brush 2 during operation.

[0058] Specifically, during the operation of the cleaning head 100, the first roller brush 2 is prone to getting tangled with hair and other dirt due to continuous contact with the ground. If the dirt is not removed in time, it will affect the normal rotation of the first roller brush 2, and may even lead to problems such as increased motor load and stalling. To solve this problem, a second roller brush 3 is provided on one side of the first roller brush 2. The second roller brush 3 works in conjunction with the first roller brush 2 to clean or collect dirt attached to the first roller brush 2, especially filamentous objects such as hair and fibers that are difficult to detach automatically.

[0059] To clean or collect dirt adhering to the first roller brush 2, the first roller brush 2 and the second roller brush 3 can be in direct contact or indirect contact. When the second roller brush 3 is in direct contact with the first roller brush 2, dirt is removed primarily through physical contact and relative movement. A shearing force is generated between the second roller brush 3 and the first roller brush 2, cutting or peeling off foreign objects such as hair entangled on the first roller brush 2. If the second roller brush 3 and the first roller brush 2 are not in direct contact, aerodynamics, electrostatic adsorption, magnetic attraction, or other physical mechanisms can be combined to enhance the non-contact cleaning capability. For example, if the first roller brush 2 has a metal core structure, the second roller brush 3 can be equipped with a magnetic component to adsorb metal shavings or other magnetic impurities adhering to the first roller brush 2; or an electrostatic material can be coated on the surface of the second roller brush 3 to capture airborne microparticles through electrostatic adsorption, preventing them from re-adhering to the first roller brush 2.

[0060] When the second roller brush 3 is in direct contact with the first roller brush 2, the first roller brush 2 and the second roller brush 3 can be arranged with their axes parallel to each other to ensure that there is a maximum effective contact area between the first roller brush 2 and the second roller brush 3. Of course, the second roller brush 3 can also be set with a certain tilt angle so that the contact area between it and the first roller brush 2 forms a gradual pressure distribution, thereby enhancing the ability to peel off tangled materials. In addition, guide grooves or collection chambers can be provided at the end or around the second roller brush 3 to temporarily store the dirt cleaned off the first roller brush 2, and finally guide it to the dust collection box through airflow.

[0061] Understandably, both the first roller brush 2 and the second roller brush 3 are partially or entirely located within the suction duct a. The first roller brush 2 is closer to the air inlet 1b, making it easier to contact and disturb ground contaminants immediately. The second roller brush 3 is located near the air outlet 1c, enabling it to complete the cleaning of the first roller brush 2 before the airflow leaves the suction duct a, and also allowing for better utilization of the airflow within the duct to efficiently remove the cleaned-up dirt.

[0062] By setting a second roller brush 3 to clean or collect hair on the first roller brush 2, the cleaning equipment can achieve self-cleaning capability during operation without the need for frequent manual cleaning by the user, reducing the frequency of manual cleaning of the roller brush. By setting the second roller brush 3 closer to the air outlet 1c, it can not only clean the first roller brush 2 in real time during the cleaning process, but also use the airflow in the suction duct a to quickly expel the cleaned hair and other dirt, avoiding secondary pollution or blockage problems.

[0063] Specifically, please refer to Figure 9 and Figure 15 In this embodiment, the housing 1 has a receiving cavity 1a that is connected to the dust suction duct a, and the first roller brush 2 and the second roller brush 3 are both located in the receiving cavity 1a.

[0064] Specifically, one end of the receiving cavity 1a is connected to the air inlet 1b, and the other end is located near the air outlet 1c. The receiving cavity 1a is directly connected to the dust suction duct a. The receiving cavity 1a can be regarded as an extended space connected to the dust suction duct a, which is equivalent to partially expanding the original dust suction duct a, so that the surface areas of the first roller brush 2 and the second roller brush 3 are both on the effective action path of the airflow.

[0065] When the cleaning head 100 is working, outside air enters the suction duct a from the air inlet 1b, flows through the receiving cavity 1a, and is finally discharged from the air outlet 1c. Because the receiving cavity 1a expands the effective flow area inside the suction duct a, the airflow maintains a relatively uniform speed distribution even after the first roller brush 2 disturbs the ground and carries in pollutants. This makes the airflow influence on the first roller brush 2 and the second roller brush 3 more uniform during rotation, thus more effectively sucking dust, hair, and other dirt into the dust collection system.

[0066] For details, please continue reading Figure 9 and Figure 15 In this embodiment, the inner wall of the receiving cavity 1a is adapted to the outer contours of the first roller brush 2 and the second roller brush 3.

[0067] Specifically, because the roller brush drives the surrounding airflow during rotation, forming a local vortex or negative pressure zone, the inner wall shape of the receiving cavity 1a maintains a certain gap fit with the outer contour of the first roller brush 2 and the second roller brush 3, so that the roller brush will not collide or interfere during rotation, while being as close as possible to the roller brush surface, thereby guiding the airflow direction, making it more effective on the roller brush surface, improving the peeling effect of attached pollutants, and accelerating the transport of dirt to the air outlet 1c.

[0068] For details, please continue reading Figure 9 and Figure 15 In this embodiment, the air inlet 1b is located at the bottom of the housing 1, and the air outlet 1c is located at the top or rear of the housing 1.

[0069] Thus, by placing the air inlet 1b in the bottom area of ​​the housing 1, that is, the side close to the surface to be cleaned (such as the floor, carpet, etc.), the air inlet 1b can directly face the pollution source on the ground, thereby improving the efficiency of sucking up dust, particulate matter and long foreign objects (such as hair).

[0070] In most household cleaning devices, the exhaust fan is usually integrated behind the cleaning head 100 or in the handle area for user operation and overall balance. If the air outlet 1c is located at the front or bottom of the cleaning head 100, the airflow needs to be guided to the exhaust system through a long and winding duct, which not only increases wind resistance but may also lead to airflow turbulence and suction power reduction. Placing the air outlet 1c at the top or rear shortens the connection path from the suction duct a to the exhaust system, reducing resistance loss during airflow transmission.

[0071] When the air inlet 1b is located at the bottom and the air outlet 1c is located at the top or rear, the airflow in the dust extraction duct a tends to flow from bottom to top or from front to back, reducing airflow swirl or stagnation and preventing dirt from accumulating in the duct and causing blockage.

[0072] For further information, please refer to [link / reference]. Figure 9 and Figure 15 In this embodiment, the air outlet 1c is located at the rear of the housing 1; the second roller brush 3 is located behind the first roller brush 2.

[0073] It should be noted that, from the perspective of the cleaning process, the second roller brush 3 is located behind the first roller brush 2. Since the first roller brush 2 disturbs most of the pollutants on the ground and sends them into the vacuum duct a, the second roller brush 3 performs self-cleaning treatment behind it, which can effectively remove the hair, fibers and other tangled objects remaining on its surface, and prevent these dirt from falling back into the uncleaned area during subsequent movement, thereby preventing secondary pollution.

[0074] Furthermore, because the second roller brush 3 is positioned behind the first roller brush 2, the contact point between the second roller brush 3 and the first roller brush 2 is close to the air outlet 1c. Since the air outlet 1c is connected to the exhaust system of the cleaning equipment, this area has a strong negative air pressure effect. When the second roller brush 3 contacts the rear of the first roller brush 2 and removes dirt, the dirt is immediately captured by the high-speed airflow and quickly discharged along the suction duct a.

[0075] In contrast, if the contact point is located at the front of the first roller brush 2 (i.e., the side near the air inlet 1b), the detached dirt is likely to fall onto the uncleaned ground and be rolled up again by the first roller brush 2 or carried into the cleaning path, causing the cleaning head 100 to repeatedly clean the same type of contaminants, affecting the overall cleaning efficiency.

[0076] Furthermore, in this embodiment, the second roller brush 3 is at least partially offset from the air outlet 1c.

[0077] It should be noted that the second roller brush 3 and the air outlet 1c are set to be "at least partially offset". For example, in the longitudinal sectional view, the central axis of the second roller brush 3 is offset from the central area of ​​the air outlet 1c by a certain degree; or in the transverse sectional view, the outer contour of the second roller brush 3 does not completely cover the cross-sectional area where the air outlet 1c is located, but leaves space for the airflow to pass smoothly; or, part of the second roller brush 3 is located within the projection range of the air outlet 1c, while another part is outside the range, thus achieving "partial offset".

[0078] It is understandable that if the second roller brush 3 is set directly opposite the air outlet 1c, its rotation will interfere with the main airflow from the dust suction duct a to the air outlet 1c. Especially when the roller brush diameter is large or the rotation speed is high, it is easy to form a local vortex area or negative pressure dead angle between the two, resulting in a decrease in airflow speed or even backflow.

[0079] By setting the second roller brush 3 at least partially offset from the air outlet 1c, sufficient airflow passage can be reserved between the roller brush and the air outlet 1c, forming a smoother flow path. This allows the stripped pollutants to be quickly captured and discharged by the main airflow, reducing energy loss and improving suction utilization.

[0080] Furthermore, in this embodiment, the second roller brush 3 is located above the axis of the air outlet 1c.

[0081] It should be noted that "the axis of the air outlet 1c" refers to an imaginary straight line connecting the center of the air outlet 1c and in the same direction as the airflow. "Located above the axis of the air outlet 1c" means that the lowest point of the second roller brush 3 or its rotation center is at a height higher than the axis in the vertical direction, so that the contact area between the second roller brush 3 and the first roller brush 2 is closer to the air outlet 1c and is located above the axis of the air outlet 1c.

[0082] Thus, when the second roller brush 3 scrapes or brushes the first roller brush 2, the cleaned hair, dust and other dirt fall downwards due to gravity and quickly enter the high-speed airflow area near the air outlet 1c, thereby shortening the distance of the dirt from the cleaning point to the point where it is captured by the airflow and increasing the probability of it being sucked into the dust collection system, thereby effectively preventing dirt from accumulating or getting tangled on the first roller brush 2 again.

[0083] Furthermore, this arrangement reduces the time that dirt remains inside the cleaning head 100. Since the second roller brush 3 is located above the air outlet 1c, the contaminants it removes are more easily affected by the airflow from the direction of the air outlet 1c during their fall, thereby accelerating their entry into the suction channel and achieving efficient cleaning and timely recovery of dirt on the surface of the first roller brush 2.

[0084] For further information, please refer to [link / reference]. Figure 8 , Figure 9 , Figure 14 and Figure 15 In this embodiment, the first roller brush 2 is at least partially exposed in the air inlet 1b to contact the surface to be cleaned, and the second roller brush 3 is configured to be spaced apart from the surface to be cleaned.

[0085] Since the first roller brush 2 is usually equipped with bristles 31, spiral patterns or other disturbance structures, and at least part of it is exposed in the air inlet 1b, it can not only stir up dust and particles on the ground during rotation, but also roll long foreign objects (such as hair and fibers) into the suction duct a. In this way, the airflow between the first roller brush 2 and the air inlet 1b can work together to make the disturbed pollutants quickly carried away by the main suction.

[0086] It should be noted that the second roller brush 3 is set to maintain a distance from the surface to be cleaned. That is, during the operation of the cleaning head 100, the second roller brush 3 does not directly contact the ground, but only interacts with the first roller brush 2.

[0087] "Interval" refers to the lowest point of the second roller brush 3 being higher than the surface to be cleaned, or its extension direction not extending to the area in contact with the ground, ensuring that it will not make physical contact with the ground under normal working conditions. This interval distance can be set according to the actual usage scenario, ensuring no contact with the ground without affecting its cleaning effect on the first roller brush 2.

[0088] Thus, the second roller brush 3 is set to maintain a distance from the surface to be cleaned, avoiding direct contact between the second roller brush 3 and the ground, thereby reducing unnecessary frictional resistance and wear risk, and reducing energy consumption and noise of the cleaning head 100 during operation; on the other hand, since the second roller brush 3 does not participate in the direct cleaning action, the structural design can be more flexible, without having to consider wear resistance or ground adaptability issues.

[0089] Furthermore, the second roller brush 3 is designed to maintain a distance from the surface to be cleaned to prevent the second roller brush 3 from being damaged by accidentally hitting obstacles in complex terrain, thereby improving the adaptability and robustness of the cleaning head 100 in different ground environments.

[0090] For example, on uneven surfaces such as carpets, tile joints, or thresholds, if the second roller brush 3 comes into contact with the ground, it may be squeezed and deformed or subjected to uneven stress due to changes in terrain, leading to structural failure or decreased cleaning performance. Therefore, by spacing it from the ground, the second roller brush 3 is ensured to always be in a stable working state.

[0091] By setting a second roller brush 3 to clean or collect hair on the first roller brush 2, the user is no longer required to clean it frequently, thus improving ease of use. Furthermore, by keeping the second roller brush 3 at a distance from the surface to be cleaned, direct contact between it and the ground is avoided, thereby reducing frictional resistance and wear, lowering energy consumption and noise, and improving the flexibility of the structural design. At the same time, it enhances the adaptability and reliability of the cleaning head 100 in complex terrain.

[0092] Specifically, in this embodiment, the second roller brush 3 is rotatably installed inside the housing 1; the cleaning head 100 also includes a first drive motor 8 and a transmission mechanism 9, the transmission mechanism 9 being a transmission connection between the first drive motor 8 and the first roller brush 2 and the second roller brush 3, so as to drive the first roller brush 2 and the second roller brush 3 to rotate respectively.

[0093] In traditional cleaning equipment, multiple motors are often required to independently drive multiple roller brushes. However, in this embodiment, by setting up a single drive motor and a transmission mechanism 9, two roller brushes can be driven simultaneously, simplifying the power system structure. The transmission mechanism 9 includes, but is not limited to, gear sets (such as bevel gears, helical gears, and planetary gears), pulley assemblies, and chain drive assemblies. The appropriate transmission form can be selected according to the actual spatial layout to achieve synchronous, differential, or reverse rotation of the two roller brushes.

[0094] In this way, only one drive motor is needed to drive the first roller brush 2 and the second roller brush 3, which allows more space to be used for auxiliary cleaning structures (such as scrapers, cutting blades, dust collection channels, etc.), making the cleaning head 100 highly integrated.

[0095] In one embodiment, the first drive motor 8 has a first output shaft 81 and a second output shaft 82 arranged opposite to each other, both the first output shaft 81 and the second output shaft 82 being rotatably arranged about a left-right extending rotation axis; the transmission mechanism includes a first transmission mechanism 91 and a second transmission mechanism 92, the first transmission mechanism 91 being drively connected to the first output shaft 81 and the first roller brush 2 to drive the first roller brush 2 to rotate; the second transmission mechanism 92 being drively connected to the second output shaft 82 and the second roller brush 3 to drive the second roller brush 3 to rotate.

[0096] It is understood that the first drive motor 8 has a first output shaft 81 and a second output shaft 82 arranged opposite to each other. Both output shafts are rotatably arranged around a left-right extending rotation axis, that is, their rotation direction is perpendicular to the forward direction (front-back direction) of the cleaning head 100, and they are located at the two ends of the motor body in the left-right direction.

[0097] In order to achieve independent drive control of the first roller brush 2 and the second roller brush 3, the transmission mechanism 9 includes a first transmission mechanism 91 and a second transmission mechanism 92. One end of the first transmission mechanism 91 is connected to the first output shaft 81 of the first drive motor 8, and the other end is connected to the first roller brush 2. It is used to transmit the power output by the motor to the first roller brush 2, so that it rotates around its own rotation axis, thereby realizing the function of cleaning the ground.

[0098] One end of the second transmission mechanism 92 is connected to the second output shaft 82 of the first drive motor 8, and the other end is connected to the second roller brush 3, which is used to drive the second roller brush 3 to rotate, thereby realizing the self-cleaning effect on the surface of the first roller brush 2.

[0099] The first transmission mechanism 91 and the second transmission mechanism 92 can be of various forms, such as gear transmission, belt transmission, sprocket transmission, or worm gear transmission. The specific selection can be reasonably set according to the internal space layout of the cleaning head 100, transmission efficiency, and noise control requirements. For example, in a preferred embodiment, the first transmission mechanism 91 adopts a spur gear set, and the second transmission mechanism 92 adopts a synchronous belt transmission.

[0100] Furthermore, since the first output shaft 81 and the second output shaft 82 of the first drive motor 8 are arranged symmetrically, the rotation direction of the first roller brush 2 and the second roller brush 3 can be kept in the same or opposite direction by reasonably designing the transmission path, thereby further enhancing the cleaning performance and self-cleaning effect.

[0101] By employing a first drive motor 8 with dual output shafts, and driving the first roller brush 2 and the second roller brush 3 to rotate via a first transmission mechanism 91 and a second transmission mechanism 92 respectively, the number of drive units required inside the cleaning head 100 is reduced, simplifying the overall structural design and lowering manufacturing costs and assembly complexity. Furthermore, since only one drive motor and its control circuit are used, energy consumption is reduced, as are potential heat sources and electrical connection points.

[0102] Furthermore, it should be noted that since both the first roller brush 2 and the second roller brush 3 are powered by the same motor and transmit torque independently through their respective transmission mechanisms, the two can maintain an ideal speed matching relationship by reasonably setting the transmission ratio, thereby improving the cleaning efficiency of the second roller brush 3 on the surface of the first roller brush 2.

[0103] Specifically, please refer to Figure 12 and Figure 13In one embodiment, the first roller brush 2 and the second roller brush 3 are both arranged side by side extending in the left and right direction; the first drive motor 8 is embedded inside the first roller brush 2, the first output shaft 81 is disposed inside the first roller brush 2 and is connected to the inner wall of the first roller brush 2 through the first transmission mechanism 91; the second output shaft 82 is exposed outside the first roller brush 2 and is connected to the second roller brush 3 through the second transmission mechanism 92.

[0104] The first drive motor 8 is embedded in the internal cavity of the first roller brush 2, forming an integrated roller brush structure. It is connected to the inner wall of the first roller brush 2 through the first transmission mechanism 91, thereby transmitting the rotational power output by the motor to the first roller brush 2, causing it to rotate around its own axis to achieve the sweeping action on the ground. The second output shaft 82 protrudes from one end of the first roller brush 2 and is connected to the second roller brush 3 through the second transmission mechanism 92, thereby driving the second roller brush 3 to rotate synchronously or asynchronously, for scraping or scrubbing the dirt attached to the surface of the first roller brush 2.

[0105] It should be noted that, compared to arranging the drive motor separately on the outside or bottom of the cleaning head 100 housing 1, which not only occupies more space but also affects the overall center of gravity distribution of the machine, this embodiment, by completely embedding the first drive motor 8 inside the first roller brush 2, forms an integrated structure of power and functional components, thereby simplifying the overall layout of the cleaning head 100 and making it suitable for small sweeping robots and other devices with strict size limitations.

[0106] Furthermore, since the first output shaft 81 directly drives the first roller brush 2 to rotate via the first transmission mechanism 91, the power transmission path is short and the response speed is fast, improving the operating efficiency and cleaning ability of the first roller brush 2. The second output shaft 82 drives the second roller brush 3 to rotate via the second transmission mechanism 92, enabling the second roller brush 3 to efficiently clean dirt from the surface of the first roller brush 2 while being arranged side by side with it. Because both roller brushes have a left-right extending structure and their rotation axes are aligned, the contact state between them can be kept stable, resulting in a uniform cleaning effect.

[0107] Further, please refer to Figures 3 to 6 In this embodiment, the cleaning head 100 further includes a cutting structure 4 disposed in the receiving cavity 1a, the cutting structure 4 being used to cut hair wrapped around the second roller brush 3.

[0108] It should be noted that the cutting structure 4 is mainly used to cut the hair wrapped around the second roller brush 3, preventing tangling and shortening its length so that it can be discharged from the air outlet 1c and enter the dust collection box or other collection device, thus preventing hair accumulation from causing blockage or affecting the cleaning effect. The cutting structure 4 can be fixedly installed inside the housing 1, close to the second roller brush 3; or it can be directly integrated into the second roller brush 3, moving together with the second roller brush 3 to achieve the effect of scraping and cutting simultaneously; in some embodiments, the cutting structure 4 can also be set on the first roller brush 2, using the rotation of the first roller brush 2 to drive its movement, and simultaneously cutting the scraped hair. The specific design can be based on the actual situation, and this specification does not limit this embodiment.

[0109] In one specific implementation, please refer to Figures 3 to 6 The cutting structure 4 includes two cutting portions 41, which extend along the axial direction of the second roller brush 3 and can move relative to each other in the axial direction (i.e., the length direction) or the radial direction. This allows the two cutting portions 41 to produce a scissor-like cutting action, thereby more effectively cutting the hair wrapped around the surface of the second roller brush 3.

[0110] To achieve the aforementioned shearing function, the cleaning head 100 also includes a third transmission mechanism 5, which is disposed between the second roller brush 3 and the two cutting sections 41. Its function is to convert the rotational motion of the second roller brush 3 into the relative motion stroke between the two cutting sections 41. For example, when the second roller brush 3 rotates, the transmission mechanism can drive one of the cutting sections 41 to slide or swing relative to the other cutting section 41, thereby generating a shearing force.

[0111] Specifically, the third transmission mechanism 5 can adopt a gear and rack structure, a cam and connecting rod structure, a screw transmission mechanism, or other similar mechanical transmission methods. These structures can convert the continuous rotational motion of the second roller brush 3 into a periodic cutting action, so that the two cutting parts 41 continuously open and close during the rotation of the cleaning component, and continuously perform efficient cutting treatment on the hair wrapped on its surface.

[0112] Since the shearing action between the two cutting sections 41 is driven by the rotation of the second roller brush 3 itself, no additional motor or drive device is required. The structure is simple and compact, making it easy to integrate into the internal space of the cleaning head 100. Furthermore, this structure can automatically adjust the shearing frequency according to changes in the rotation speed of the cleaning components, adapting it to the hair cleaning needs of different usage scenarios.

[0113] Specifically, in this embodiment, the second roller brush 3 includes a base 32 and bristles 31 mounted on the periphery of the base 32. One of the cutting portions 41 is fixedly mounted on the base 32 and at least partially protrudes outward from the surface of the base 32. The third transmission mechanism 5 includes a slider 51, which is movably disposed relative to the base 32 along the axial direction and / or radial direction of the second roller brush 3. Another cutting portion 41 is fixedly mounted on the slider 51 and at least partially protrudes outward from the surface of the base 32.

[0114] Two cutting parts 41 are respectively installed on the base 32 of the second roller brush 3 and the sliding member 51, and the rotational motion of the cleaning component is converted into the reciprocating motion of the sliding member 51 through the third transmission mechanism 5, so as to realize the automatic cutting action between the two cutting parts 41.

[0115] This design not only fully utilizes the rotational power of the second roller brush 3, avoiding the introduction of additional drive components, but also ensures good synchronization and stability of the cutting action. Through the flexible movement of the slider 51, an effective cutting angle can be formed between the two cutting sections 41, efficiently cutting hair entangled on the surface of the cleaning component and preventing hair accumulation from affecting the cleaning effect. Furthermore, the design of the cutting section 41 protruding from the surface of the base 32 ensures that the cutting section 41 can effectively target the hair without losing its cutting ability due to excessive depth.

[0116] In one specific embodiment, a guide structure is provided between the sliding member 51 and the second roller brush 3 to guide the sliding member 51 to perform controllable reciprocating motion in the axial direction or radial direction of the second roller brush 3.

[0117] Specifically, the base 32 of the second roller brush 3 and the slider 51 are provided with a guide groove 51a, and the other is provided with a guide portion 61 that matches the guide groove 51a. The guide portion 61 can be a protrusion, a pin, or other adaptable structure, which can be inserted into the guide groove 51a and slide along it.

[0118] When the second roller brush 3 rotates, the guide portion 61 rotates together with the cleaning component and slides relative to it within the guide groove 51a. Due to the shape design of the guide groove 51a, such as an inclined groove, an arc groove, or a curved groove, the guide portion 61 generates a certain displacement component during its sliding process, pushing the slider 51 to move axially or radially, so as to convert the rotational motion of the second roller brush 3 into the linear or oscillating motion of the slider 51.

[0119] A cutting part 41 is mounted on the slider 51, so when it moves, the cutting part 41 will move relative to another cutting part 41 fixed on the base 32, forming a shearing stroke similar to scissors. The shearing action can continue during the rotation of the second roller brush 3, achieving efficient cutting of hair wrapped around its surface.

[0120] By providing a guide groove 51a and a guide portion 61 between the slider 51 and the second roller brush 3, the slider 51 can automatically generate reciprocating motion during the rotation of the cleaning component, thereby driving the two cutting portions 41 to form a shearing action. This mechanical linkage method is not only simple in structure and stable in operation, but also relies entirely on the rotational power of the second roller brush 3 itself, without the need to introduce an additional drive device, reducing energy consumption and manufacturing costs, and is suitable for the miniaturized spatial layout of the cleaning head 100.

[0121] Specifically, the extension direction of the guide groove 51a is inclined to intersect the axial direction of the second roller brush 3, and the guide portion 61 extends radially along the second roller brush 3 and passes through the guide groove 51a.

[0122] The guide groove 51a is configured to intersect the axis of the cleaning component at an angle, and the guide portion 61 extends radially along the cleaning component and passes through it. This allows the sliding of the guide portion 61 within the guide groove 51a during the rotation of the cleaning component to be naturally converted into axial displacement of the slider 51. This configuration, by utilizing the angular characteristics of the inclined guide groove 51a, converts rotational motion into linear motion, thereby driving the shearing action between the two cutting portions 41 and achieving continuous and efficient cutting of hair on the surface of the second roller brush 3.

[0123] More specifically, in this embodiment, the third transmission mechanism 5 further includes a mounting shaft 6 extending along the axis of the second roller brush 3. One end of the mounting shaft 6 is fixedly connected to the housing 1 of the cleaning head 100, and the other end extends into the interior of the second roller brush 3, with a bearing 7 sleeved around it. The base 32 of the second roller brush 3 is connected to the outer ring of the bearing 7, allowing the entire cleaning component to rotate freely relative to the mounting shaft 6 under the action of the bearing 7.

[0124] A guide portion 61 extends outward from the side of the mounting shaft 6. This guide portion 61 can be a pin or a protruding structure, and forms a sliding fit with the guide groove 51a provided on the sliding member 51. When the second roller brush 3 rotates with the bearing 7, the sliding member 51 and its guide groove 51a will also rotate. However, since the guide portion 61 is fixed on the mounting shaft 6, the guide portion 61 will slide relative to the guide groove 51a.

[0125] Because the guide groove 51a is inclined, the guide part 61 will generate a displacement component along the axis of the cleaning component during its sliding process, which will push the slider 51 to move axially. A cutting part 41 is installed on the slider 51, and another cutting part 41 is fixed on the base 32 of the cleaning component. Therefore, the movement of the slider 51 will cause the two cutting parts 41 to form a scissor-like opening and closing action.

[0126] By introducing a structural combination of mounting shaft 6 and bearing 7 into the third transmission mechanism 5, and using the guide part 61 on the mounting shaft 6 and the guide groove 51a on the sliding member 51 for driving cooperation, the second roller brush 3 can automatically drive the sliding member 51 to generate axial displacement during its own rotation, thereby driving the two cutting parts 41 to form a shearing action.

[0127] Specifically, in the first embodiment, each of the cutting portions 41 includes a blade that extends continuously along the axial direction of the second roller brush 3 and does not protrude from the axial end face of the second roller brush 3.

[0128] Specifically, the blade is embedded entirely inside or near the surface of the second roller brush 3, and its two ends do not extend beyond the axial end face of the cleaning component, i.e., they do not protrude outwards. This allows the blade to uniformly cut the hair wrapped around its surface along the entire length of the cleaning component.

[0129] In the second embodiment, each of the cutting portions 41 includes a plurality of blades spaced apart in the axial direction of the second roller brush 3, so as to reduce the amount of material used while maintaining good shearing performance.

[0130] Further, in this embodiment, the second roller brush 3 includes a base 32 and bristles 31 mounted on the periphery of the base 32. The cutting structure 4 is mounted on the base 32 and protrudes outward from the base 32 along the radial direction of the second roller brush 3. The maximum radial distance between the cutting structure 4 and the central axis of the base 32 is d1, and the maximum radial distance between the bristles 31 and the central axis of the base 32 is d2, where d2 > d1.

[0131] It should be noted that "maximum radial distance" refers to the maximum straight-line distance between the outermost point of a certain structure (such as bristle 31 or cutting structure 4) from the rotation center of the second roller brush 3. This distance is measured from the geometric center of the cleaning component along a direction perpendicular to the axis of the cleaning component to the outermost position of the structure.

[0132] Specifically: d1 refers to the maximum radial distance between the cutting structure 4 and the central axis of the base 32 of the second roller brush 3 to its outermost edge; d2 refers to the maximum radial distance between the bristles 31 and the central axis of the base 32 of the second roller brush 3 to its outermost end.

[0133] Setting d2 to be greater than d1 means that although the cutting structure 4 protrudes outward, its position is always inside the bristles 31. During the process of the second roller brush 3 and the first roller brush 2 approaching and making contact, the bristles 31 always contact the first roller brush 2 first, while the cutting structure 4 is "protected" inside by the bristles 31 and will not directly contact the surface of the first roller brush 2 or the bristles 31. Even if, during actual operation, the bristles 31 undergo slight deformation due to the rotation of the cleaning components, pressure changes, or uneven ground, the cutting structure 4 will not accidentally contact the first roller brush 2, thus effectively preventing accidental damage to the first roller brush 2 due to the cutting structure 4.

[0134] Specifically, in this embodiment, 1mm ≤ d2 - d1 ≤ 3mm. Preferably, 1.5mm ≤ d2 - d1 ≤ 2mm.

[0135] It should be noted that if the radial distance difference between the bristles 31 and the cutting structure 4 is too small, such as less than 1 mm, the cutting structure 4 may be accidentally exposed and come into contact with the first roller brush 2 when the bristles 31 are deformed, causing accidental cutting of the surface of the first roller brush 2, resulting in wear or even jamming; while if the distance difference is too large, such as more than 3 mm, the cutting structure 4 may be far from the outer surface of the cleaning component, affecting its cutting efficiency for tangled hair.

[0136] Therefore, controlling the distance difference between 1 and 3 mm, and further optimizing it to between 1.5 and 2 mm, can effectively avoid unnecessary interference between the cutting structure 4 and the first roller brush 2 while ensuring good shearing effect, thus achieving the best balance between cleaning efficiency and safety.

[0137] This utility model also proposes a cleaning device. Specifically, the cleaning device can be a vacuum cleaner, sweeper, floor scrubber, mite remover, fabric cleaner, carpet cleaner, pet hair cleaner, handheld multi-functional cleaner, etc. The cleaning device includes a cleaning head 100. The specific structure of the cleaning head 100 is as described in the above embodiments. Since this cleaning device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0138] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cleaning head (100) characterized by, include: The housing (1) has a dust suction duct (a), and an air inlet (1b) and an air outlet (1c) connected to the dust suction duct (a); The first roller brush (2) is rotatably mounted inside the housing (1); as well as, The second roller brush (3) is installed inside the housing (1) and is used to clean or collect dirt on the first roller brush (2); The first roller brush (2) and the second roller brush (3) are at least partially located within the dust extraction duct (a), and the second roller brush (3) is positioned closer to the air outlet (1c) than the first roller brush (2).

2. The cleaning head (100) as described in claim 1, characterized in that, The housing (1) has a receiving cavity (1a) that is connected to the dust suction duct (a), and the first roller brush (2) and the second roller brush (3) are both located in the receiving cavity (1a).

3. The cleaning head (100) as described in claim 2, characterized in that, The inner wall of the receiving cavity (1a) is adapted to the outer contours of the first roller brush (2) and the second roller brush (3).

4. The cleaning head (100) as described in claim 1, characterized in that, The air inlet (1b) is located at the bottom of the housing (1), and the air outlet (1c) is located at the top or rear of the housing (1).

5. The cleaning head (100) as described in claim 4, characterized in that, The air outlet (1c) is located at the rear of the housing (1); The second roller brush (3) is located behind the first roller brush (2).

6. The cleaning head (100) as claimed in claim 1, characterized in that, The second roller brush (3) is at least partially offset from the air outlet (1c).

7. The cleaning head (100) as described in claim 1, characterized in that, The second roller brush (3) is located above the axis of the air outlet (1c).

8. The cleaning head (100) as claimed in claim 1, characterized in that, The first roller brush (2) is at least partially exposed in the air inlet (1b) to contact the surface to be cleaned, and the second roller brush (3) is configured to be spaced apart from the surface to be cleaned.

9. The cleaning head (100) as claimed in claim 1, characterized in that, The second roller brush (3) is rotatably mounted inside the housing (1); The cleaning head (100) also includes a first drive motor (8) and a transmission mechanism (9). The transmission mechanism (9) drives the first drive motor (8) to the first roller brush (2) and the second roller brush (3) to drive the first roller brush (2) and the second roller brush (3) to rotate respectively.

10. The cleaning head (100) as claimed in claim 9, characterized in that, The first drive motor (8) has a first output shaft (81) and a second output shaft (82) arranged opposite to each other, and both the first output shaft (81) and the second output shaft (82) are rotatably arranged about a left-right extending rotation axis; The transmission mechanism (9) includes a first transmission mechanism (91) and a second transmission mechanism (92). The first transmission mechanism (91) is connected to the first output shaft (81) and the first roller brush (2) to drive the first roller brush (2) to rotate. The second transmission mechanism (92) is connected to the second output shaft (82) and the second roller brush (3) to drive the second roller brush (3) to rotate.

11. The cleaning head (100) as claimed in claim 10, characterized in that, The first roller brush (2) and the second roller brush (3) are both extended in the left and right direction and are arranged side by side; The first drive motor (8) is embedded inside the first roller brush (2), and the first output shaft (81) is located inside the first roller brush (2) and is connected to the inner wall of the first roller brush (2) through the first transmission mechanism (91). The second output shaft (82) is exposed outside the first roller brush (2) and is connected to the second roller brush (3) through the second transmission mechanism (92).

12. The cleaning head (100) as claimed in claim 1, characterized in that, The cleaning head (100) also includes a cutting structure (4) disposed in the suction duct (a), the cutting structure (4) being used to cut hair wrapped around the second roller brush (3).

13. The cleaning head (100) as claimed in claim 12, characterized in that, The cutting structure (4) includes two cutting portions (41) stacked together, each cutting portion (41) extending along the axial direction of the second roller brush (3). The two cutting portions (41) are movably arranged relative to each other in the axial direction and / or radial direction of the second roller brush (3) to cut the hair wrapped around the second roller brush (3).

14. The cleaning head (100) as claimed in claim 13, characterized in that, A third transmission mechanism (5) is provided between the second roller brush (3) and the two cutting parts (41). The third transmission mechanism (5) is used to convert the rotation stroke of the second roller brush (3) into the shearing stroke of the two cutting parts (41) moving relative to each other.

15. A cleaning device, characterized in that, Includes the cleaning head (100) as described in any one of claims 1 to 14.

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