Roller brush mechanism and sweeping robot

Abstract

The present invention relates to a roller brush mechanism and a sweeping robot, comprising: a fixed shell; a floating shell, the floating shell being provided with a roller brush chamber for mounting a roller brush, the floating shell being movably connected to the fixed shell and capable of floating relative to the fixed shell under the action of an external force; a roller brush driving member, the roller brush driving member being mounted at one end of the floating shell in the extension direction of the roller brush chamber and capable of floating relative to the fixed shell along with the floating shell; and a balancing member located at the same end of the floating shell as the roller brush driving member, the balancing member being capable of applying a balancing force to the floating shell to balance the weight of the roller brush driving member, the direction of the balancing force being opposite to the direction of the weight of the roller brush driving member, so that the forces at both ends of the floating shell tend to be balanced. By providing the balancing member, the forces at both ends of the floating shell are evenly distributed, thereby improving the floating stability of the floating shell.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent electrical appliances, and in particular to a roller brush mechanism and a sweeping robot. Background Art

[0002] With the development of economy and the progress of society, people have higher and higher requirements for the quality of life. Therefore, some intelligent appliances that can free up manual labor have emerged. Among them, sweeping robots, as a kind of intelligent household appliances, play an increasingly important role in people's daily lives.

[0003] A sweeping robot includes a roller brush mechanism, a travel assembly, and a power supply assembly. The roller brush mechanism is used to collect dust from the ground, the travel assembly is used to drive the sweeping robot, and the power supply assembly is used to provide energy for the roller brush mechanism and the travel assembly. Generally, the roller brush mechanism includes a fixed shell, a floating shell, a roller brush, a roller brush cover, and a roller brush driver that drives the roller brush to rotate. The roller brush is located within the floating shell, which is relatively mounted on the fixed shell in a floating manner. The roller brush cover is located on the floating shell and has a dust suction port that allows the roller brush to contact the ground. The roller brush driver is connected to the floating shell and is used to drive the roller brush to rotate as the floating shell floats relative to the fixed shell.

[0004] Along the axial direction of the roller brush, the roller brush driving member is generally assembled at one end of the floating shell, which results in uneven force on both ends of the floating shell, thereby causing poor floating stability of the floating shell. Summary of the Invention

[0005] Based on this, it is necessary to solve the problem of poor floating stability of the floating shell and provide a roller brush mechanism and a sweeping robot that can improve the floating stability of the floating shell.

[0006] A roller brush mechanism, comprising:

[0007] Fixed shell;

[0008] A floating shell, wherein the floating shell is provided with a roller brush cavity for assembling a roller brush, the floating shell is movably connected to the fixed shell and can float relative to the fixed shell under the action of an external force;

[0009] a roller brush driving member, which is assembled at one end of the floating shell in the extending direction of the roller brush chamber and is capable of floating relative to the fixed shell along with the floating shell; and

[0010] A balancing member is located at the same end of the floating shell as the roller brush drive member. The balancing member can apply a balancing force to the floating shell to balance the gravity of the roller brush drive member. The direction of the balancing force is opposite to the direction of the gravity of the roller brush drive member, so that the forces at both ends of the floating shell tend to be balanced.

[0011] In one embodiment, the balancing member includes an elastic member, one end of the elastic member is connected to the floating shell, and the other end of the elastic member is connected to the fixed shell, and the elastic member applies the balancing force to the floating shell.

[0012] In one embodiment, one end of the elastic member is connected to the floating shell through the roller brush driving member.

[0013] In one embodiment, the elastic member is stretched between the floating shell and the fixed shell, and the stretching restoring force of the elastic member forms the balancing force.

[0014] In one embodiment, the elastic member is compressed and disposed between the floating shell and the fixed shell, and the compressive restoring force of the elastic member forms the balancing force.

[0015] In one embodiment, the elastic member is a spring.

[0016] In one embodiment, the balancing member includes a first sub-balancing member and a second sub-balancing member, the first sub-balancing member is arranged on the fixed shell, and the second sub-balancing member is arranged on the roller brush driving member or the floating shell, the first sub-balancing member and the second sub-balancing member attract each other to generate the balancing force, or the first sub-balancing member and the second sub-balancing member repel each other to generate the balancing force.

[0017] In one embodiment, both the first sub-balancer and the second sub-balancer are magnets.

[0018] In one embodiment, a first action line of the balancing force applied by the balancing member to the floating shell coincides with a second action line passing through the center of gravity of the roller brush driving member.

[0019] A sweeping robot comprises the roller brush mechanism as described in any one of the above items.

[0020] The roller brush mechanism and the sweeping robot are provided with a balancing member, so that the forces at both ends of the floating shell are evenly distributed, thereby improving the floating stability of the floating shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded view of some structures of a sweeping robot provided by an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Assembly drawings of other structures of the sweeping robot shown in ;

[0023] Figure 3 for Figure 1 Assembly drawings of some structures of the sweeping robot shown in ;

[0024] Figure 4 for Figure 3 A cross-sectional view of the AA plane of some structures of the sweeping robot shown in FIG;

[0025] Figure 5 for Figure 1 Assembly drawings of some further structures of the sweeping robot shown in ;

[0026] Figure 6 for Figure 5 A plan view of some further structures of the sweeping robot shown in ;

[0027] Figure 7 for Figure 6 A cross-sectional view of the BB surface of some other structures of the sweeping robot shown in FIG;

[0028] Figure 8 for Figure 1 A plan view of some further structures of the sweeping robot shown in ;

[0029] Figure 9 for Figure 8 Cross-sectional views of some structures of the cleaning robot shown in the CC plane;

[0030] Figure 10 for Figure 8 Axonometric views of the partial structures of some other structures of the sweeping robot shown in FIG.

[0031] 100. Sweeping robot; 10. Roller brush mechanism; 11. Fixed shell; 111. Assembly cavity; 112. Second opening; 113. First assembly slot; 12. Floating shell; 121. Roller brush cavity; 122. First opening; 123. Rotating arm; 13. Buffer; 131. Main body; 132. Flanged edge; 133. Embedded slot; 134. First airflow cavity; 14. Fixed assembly; 141. Fixed member; 142. Second airflow cavity; 15. Roller brush driving member; 151. Second assembly slot; 16. Balance member; 161. Elastic member; 162. First sub-balance member; 163. Second sub-balance member. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0038] See Figure 1 One embodiment of the present invention provides a sweeping robot 100, including a roller brush mechanism 10 for collecting dust from the ground. The roller brush mechanism 10 includes a fixed housing 11, a floating housing 12, and a roller brush (not shown). The floating housing 12 defines a roller brush chamber 121, within which the roller brush is mounted. The floating housing 12 is movably connected to the fixed housing 11 and is capable of floating relative to the fixed housing 11 under the action of an external force. With this arrangement, if the roller brush encounters an obstacle during operation of the sweeping robot 100, the floating housing 12 can drive the roller brush upward to float over the obstacle.

[0039] The roller brush mechanism 10 also includes a buffer 13. One end of the floating housing 12 is provided with a first opening 122 that communicates with the roller brush chamber 121. One end of the buffer 13 is connected to the end of the floating housing 12 with the first opening 122, while the other end of the buffer 13 is fixedly connected to the fixed housing 11. With this arrangement, if the roller brush of the sweeping robot 100 encounters an obstacle during operation, the floating housing 12 compresses the buffer 13, causing the roller brush to float upward and overcome the obstacle.

[0040] In one embodiment, the buffer member 13 is a flexible tube, specifically, a silicone tube. Of course, in other embodiments, the specific structure and material of the buffer member 13 are not specifically limited, as long as the buffering effect can be achieved and the purpose of facilitating the flow of air can be achieved.

[0041] Furthermore, a pivoting arm 123 is provided on one side of the floating housing 12, and the buffer 13 is connected to the other side of the floating housing 12. The floating housing 12 is pivotally connected to the fixed housing 11 via the pivoting arm 123. When subjected to an external force, the floating housing 12 rotates relative to the fixed housing 11 via the pivoting arm 123, causing the buffer 13 to elastically deform and float. Thus, while the floating housing 12 compresses the buffer 13, causing the roller brush to float upward, the other side of the floating housing 12 rotates relative to the fixed housing 11 via the pivoting arm 123, thereby achieving the purpose of floating the floating housing 12 and the roller brush as a whole floating upward.

[0042] See Figure 2Specifically, the two rotating arms 123 are spaced apart along the extension direction of the floating shell 12 (the axial direction of the roller brush). When subjected to an external force, the floating shell 12 rotates relative to the fixed shell 11 via the two rotating arms 123, causing the buffer 13 to elastically deform and float. Thus, while the floating shell 12 compresses the buffer 13 and causes the roller brush to float upward, the other side of the floating shell 12 rotates relative to the fixed shell 11 via the two rotating arms 123, thereby achieving the purpose of floating the floating shell 12 and the roller brush as a whole floating upward. It should be understood that in other embodiments, the number of rotating arms 123 is not limited, as long as the floating shell 12 can rotate relative to the fixed shell 11 via the rotating arms 123 when subjected to an external force.

[0043] In one embodiment, the roller brush mechanism 10 further includes a roller brush cover (not shown), which is mounted on the floating housing 12 and has a dust inlet (not shown). During operation, the roller brush draws in dust from the outside through the dust inlet. When subjected to external forces, the roller brush cover can float relative to the fixed housing 11 along with the floating housing 12.

[0044] In one embodiment, the buffer 13 and the floating shell 12 are integrally injection molded, and the buffer 13 is sleeved inside the floating shell 12. It should be understood that in other embodiments, the buffer 13 and the floating shell 12 may not be integrally injection molded. For example, in another embodiment, the roller brush mechanism 10 further includes a connector (not shown in the figure), which is integrally injection molded with the buffer 13, and the connector is connected to the floating shell 12. In one specific embodiment, the connector is connected to the floating shell 12 by screws. In another specific embodiment, the connector may also be connected to the floating shell 12 by snap-fitting, which is not limited here. Therefore, the connection method between the buffer 13 and the floating shell 12 is not limited here. As long as the connection method can ensure the sealing effect at the connection between the buffer 13 and the floating shell 12, it is within the protection scope of this application.

[0045] See Figure 3 and Figure 4 In one embodiment, the roller brush mechanism 10 further includes a fixing assembly 14. One end of the buffer 13 connected to the fixed housing 11 is pressed and fixed between the fixing assembly 14 and the fixed housing 11. The floating housing 12 floats relative to the fixed housing 11 under the action of the buffer 13. In this embodiment, the buffer 13 is connected to the fixed housing 11 by being pressed and fixed to the fixing assembly 14 and the fixed housing 11, thereby avoiding the conventional hot-welding process used for connection to the fixed housing 11, saving time and effort. Furthermore, during connection, the fixing assembly 14 presses against the buffer 13, securing the fixing assembly 14, the buffer 13, and the fixed housing 11, ensuring a secure connection.

[0046] The fixed housing 11 is provided with an assembly cavity 111 and a second opening 112 communicating with the assembly cavity 111. The floating housing 12 is disposed within the assembly cavity 111. The other end of the buffer member 13 extends from the second opening 112 and is compressed and secured between the fixed assembly 14 and the fixed housing 11. With this arrangement, if the roller brush of the sweeping robot 100 encounters an obstacle during operation, the floating housing 12 compresses the buffer member 13, causing the roller brush to float upward within the assembly cavity 111. The other side of the floating housing 12 rotates relative to the fixed housing 11 via the pivot arm 123, thereby causing the floating housing 12 and the roller brush to float upward.

[0047] Of course, in some other embodiments, the fixing housing 11 may also omit the assembly cavity 111 , and the specific structure of the fixing housing 11 is not limited here.

[0048] The buffer member 13 includes a body 131 and a flange 132. The body 131 is connected to the floating shell 12. The flange 132 is connected to the body 131 and extends through the second opening 112. The flange 132 is compressed and fixed between the fixing assembly 14 and the fixed shell 11. The buffer member 13 includes the flange 132, which facilitates the compression and fixation of the buffer member 13.

[0049] In one embodiment, an insertion groove 133 is formed on the side of the flange 132 facing away from the fixing assembly 14. A portion of the fixing shell 11 is inserted into the insertion groove 133. The fixing assembly 14 presses the flange 132 against the fixing shell 11, thereby ensuring a tight connection between the buffer 13 and the fixing shell 11. In another embodiment, the insertion groove 133 can also be defined by the body 131 and the flange 132.

[0050] In one embodiment, the fixing assembly 14 includes a fixing member 141 and a fastener (not shown). The buffer member 13 is compressed and disposed between the fixing member 141 and the fixing housing 11. The fastener is disposed through the fixing member 141 and the fixing housing 11 to securely connect the fixing member 141, the buffer member 13, and the fixing housing 11. Specifically, the fastener is a fastening screw.

[0051] See Figure 5 In one embodiment, the roller brush mechanism 10 further includes a roller brush driver 15. The roller brush driver 15 is mounted on one end of the floating housing 12 in the direction in which the roller brush chamber 121 extends, i.e., in the axial direction of the roller brush. The roller brush driver 15 is capable of floating relative to the fixed housing 11 along with the floating housing 12. When the robot vacuum 100 is in operation, the roller brush driver 15 drives the roller brush to rotate within the floating housing 12 to collect dust.

[0052] Furthermore, the roller brush driver 15 includes a motor (not shown) and a transmission member (not shown). The transmission member is connected between the motor and the roller brush, and the motor drives the roller brush to rotate via the transmission member. It is understood that in other embodiments, the configuration of the roller brush driver 15 is not limited to this. For example, the roller brush driver 15 may omit the transmission member and include only the motor. Alternatively, the roller brush driver 15 may employ other drive methods, as long as it can achieve the purpose of driving the roller brush.

[0053] See Figure 6 and Figure 7 The roller brush mechanism 10 also includes a balancing member 16, which is located at the same end of the floating shell 12 as the roller brush. The balancing member 16 applies a balancing force to the floating shell 12 to counterbalance the weight of the roller brush driver 15. The direction of the balancing force is opposite to the direction of the weight of the roller brush driver 15, thereby balancing the forces at both ends of the floating shell 12. The provision of the balancing member 16 evens out the forces at both ends of the floating shell 12, thereby improving the floating stability of the floating shell 12.

[0054] Specifically, the first action line of the balancing force applied by the balancing member 16 to the floating shell 12 coincides with the second action line passing through the center of gravity of the roller brush driving member 15, thereby further ensuring uniform force at both ends of the floating shell 12 and further increasing the floating stability of the floating shell 12.

[0055] In one embodiment, the balancing member 16 includes an elastic member 161. One end of the elastic member 161 is connected to the floating shell 12, and the other end is connected to the fixed shell 11. The elastic member 161 applies the aforementioned balancing force to the floating shell 12. As such, when the floating shell 12 floats relative to the fixed shell 11, the elastic member 161 does not interfere with the free floating of the floating shell 12, and can still apply the aforementioned balancing force to the floating shell 12. This ensures the proper function of the floating shell 12 while also improving its floating stability. Specifically, one end of the elastic member 161 is connected to the floating shell 12 via the roller brush drive 15. Of course, in other embodiments, the elastic member 161 may also be directly connected to the floating shell 12, and this is not intended to be limiting.

[0056] In the first embodiment, the elastic member 161 is arranged in a stretched state between the floating shell 12 and the fixed shell 11. The elastic restoring force of the elastic member 161 creates the aforementioned balancing force. That is, in this embodiment, the elastic member 161 is connected between the fixed shell 11 and the floating shell 12 and is in a stretched state. The elastic restoring force generated by the stretched elastic member 161 creates the aforementioned balancing force. Specifically, the elastic member 161 is a spring.

[0057] In the second embodiment, the elastic member 161 is compressed and disposed between the floating shell 12 and the fixed shell 11. The compressive restoring force of the elastic member 161 creates the aforementioned balancing force. That is, in this embodiment, the elastic member 161 is connected between the fixed shell 11 and the floating shell 12 and is in a compressed state. The elastic restoring force generated by the compressed elastic member 161 creates the aforementioned balancing force. Specifically, the elastic member 161 is a spring. Of course, in other embodiments, the elastic member 161 may also be an elastic rubber member, which is not a limitation here.

[0058] See Figure 8 and Figure 9 In another embodiment, the balancing member 16 includes a first sub-balancing member 162 and a second sub-balancing member 163. The first sub-balancing member 162 is disposed on the fixed shell 11, and the second sub-balancing member 163 is disposed on the floating motor or the floating shell 12. The first sub-balancing member 162 and the second sub-balancing member 163 attract or repel each other to generate a balancing force.

[0059] In the first embodiment, the first sub-balancer 162 is disposed on the fixed housing 11, and the second sub-balancer 163 is disposed on the roller brush driver 15. The first sub-balancer 162 and the second sub-balancer 163 attract each other to generate the aforementioned balancing force. Specifically, the first sub-balancer 162 and the second sub-balancer 163 are both magnets, and the magnetic properties of the first sub-balancer 162 and the second sub-balancer 163 are opposite.

[0060] In the second embodiment, the first sub-balancer 162 is disposed on the fixed housing 11, and the second sub-balancer 163 is disposed on the roller brush driver 15. The first sub-balancer 162 and the second sub-balancer 163 repel each other to generate the aforementioned balancing force. Specifically, the first sub-balancer 162 and the second sub-balancer 163 are both magnets, and the magnetic properties of the first sub-balancer 162 and the second sub-balancer 163 are the same.

[0061] In a specific embodiment, the fixed housing 11 is provided with a first assembly groove 113 (see Figure 10 ), the roller brush driving member 15 is provided with a second assembly groove 151 (see Figure 2 ), the first sub-balancer 162 and the second sub-balancer 163 are respectively assembled in the first assembly groove 113 and the second assembly groove 151.

[0062] Furthermore, the sweeping robot 100 also includes a dust collection box (not shown). A second airflow chamber 142 is formed through the fixing member 141. The end of the fixing member 141 away from the buffer member 13 is connected to the dust collection box. The second airflow chamber 142 is connected to the roller brush chamber 121 through the first airflow chamber 134. When the sweeping robot 100 is in operation, the roller brush assembly collects dust on the ground. The dust enters the roller brush chamber 121 through the dust inlet, flows from the roller brush chamber 121 through the first airflow chamber 134 and the second airflow chamber 142 in sequence, and finally enters the dust collection box for collection.

[0063] One embodiment of the present invention further provides a roller brush mechanism 10 included in the above-mentioned sweeping robot 100, comprising a fixed housing 11, a floating housing 12, a roller brush driver 15, and a balancing member 16. The floating housing 12 is provided with a roller brush chamber 121 for mounting a roller brush. The floating housing 12 is movably connected to the fixed housing 11 and is capable of floating relative to the fixed housing 11 under the action of an external force. The roller brush driver 15 is mounted on one end of the floating housing 12 in the direction in which the roller brush chamber 121 extends and is capable of floating relative to the fixed housing 11 along with the floating housing 12. The balancing member 16 is capable of applying a balancing force to the floating housing 12 to counteract the weight of the roller brush driver 15. The direction of the balancing force is opposite to the direction of the weight of the roller brush driver 15, so that the forces at both ends of the floating housing 12 tend to be balanced.

[0064] The roller brush mechanism 10 provided in the embodiment of the present invention provides a balancing member 16 , thereby making the forces on both ends of the floating shell 12 uniform, thereby improving the floating stability of the floating shell 12 .

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A roller brush mechanism, characterized in that: The roller brush mechanism comprises: Fixed shell (11); a floating shell (12), the floating shell (12) being provided with a roller brush cavity (121) for assembling a roller brush, the floating shell (12) being movably connected to the fixed shell (11) and capable of floating relative to the fixed shell (11) under the action of an external force; a roller brush driving member (15), which is assembled at one end of the floating shell (12) in the extension direction of the roller brush chamber (121) and is capable of floating relative to the fixed shell (11) along with the floating shell (12); and a balancing member (16) located at the same end of the floating shell (12) as the roller brush driving member (15), wherein the balancing member (16) is capable of applying a balancing force to the floating shell (12) to balance the gravity of the roller brush driving member (15), wherein the direction of the balancing force is opposite to the direction of the gravity of the roller brush driving member (15), so that the forces at both ends of the floating shell (12) tend to be balanced; The balancing member (16) comprises an elastic member (161), one end of the elastic member (161) is connected to the floating shell (12), and the other end is connected to the fixed shell (11), and the elastic member (161) applies the balancing force to the floating shell (12).

2. The roller brush mechanism according to claim 1, characterized in that: One end of the elastic member (161) is connected to the floating shell (12) via the roller brush driving member (15).

3. The roller brush mechanism according to claim 1, characterized in that: The elastic member (161) is stretched and arranged between the floating shell (12) and the fixed shell (11), and the stretching restoring force of the elastic member (161) forms the balancing force.

4. The roller brush mechanism according to claim 1, characterized in that: The elastic member (161) is compressed and arranged between the floating shell (12) and the fixed shell (11), and the compression recovery force of the elastic member (161) forms the balancing force.

5. The roller brush mechanism according to claim 1, characterized in that: The elastic member (161) is a spring.

6. The roller brush mechanism according to claim 1, characterized in that: A first action line of the balancing force applied by the balancing member (16) to the floating shell (12) coincides with a second action line passing through the center of gravity of the roller brush driving member (15).

7. A roller brush mechanism, characterized in that: The roller brush mechanism comprises: Fixed shell (11); a floating shell (12), the floating shell (12) being provided with a roller brush cavity (121) for assembling a roller brush, the floating shell (12) being movably connected to the fixed shell (11) and capable of floating relative to the fixed shell (11) under the action of an external force; a roller brush driving member (15), which is assembled at one end of the floating shell (12) in the extension direction of the roller brush chamber (121) and is capable of floating relative to the fixed shell (11) along with the floating shell (12); and a balancing member (16) located at the same end of the floating shell (12) as the roller brush driving member (15), wherein the balancing member (16) is capable of applying a balancing force to the floating shell (12) to balance the gravity of the roller brush driving member (15), wherein the direction of the balancing force is opposite to the direction of the gravity of the roller brush driving member (15), so that the forces at both ends of the floating shell (12) tend to be balanced; The balancing member (16) comprises a first sub-balancing member (162) and a second sub-balancing member (163), wherein the first sub-balancing member (162) is arranged on the fixed shell (11), and the second sub-balancing member (163) is arranged on the roller brush driving member (15) or the floating shell (12), and the first sub-balancing member (162) and the second sub-balancing member (163) attract each other to generate the balancing force, or the first sub-balancing member (162) and the second sub-balancing member (163) repel each other to generate the balancing force.

8. The roller brush mechanism according to claim 7, characterized in that: The first sub-balancing member (162) and the second sub-balancing member (163) are both magnets.

9. The roller brush mechanism according to claim 7, characterized in that: A first action line of the balancing force applied by the balancing member (16) to the floating shell (12) coincides with a second action line passing through the center of gravity of the roller brush driving member (15).

10. A sweeping robot, characterized in that: It comprises a roller brush mechanism as described in any one of claims 1-9.

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