Anti-winding primary brush structure for a robotic floor sweeping machine

Abstract

The utility model discloses a kind of anti-winding main brush structures for floor cleaning robot, comprising: drive assembly, rolling brush assembly, cutting assembly and control system;Drive assembly includes motor and rotating shaft connected in turn along power transmission direction;Rolling brush assembly extends along the length direction of rotating shaft, and rolling brush assembly is linked with rotating shaft to rotate with rotating shaft;Cutting assembly includes one-way bearing, bearing bracket and blade;The inner ring of one-way bearing is fixedly sleeved in rotating shaft, bearing bracket is fixedly sleeved in the outer ring of one-way bearing, blade extends along the length direction of bearing bracket, the thickness of the cutting surface of blade gradually decreases from blade back to blade edge direction, and bearing bracket extends along the length direction of rolling brush assembly;Control system is electrically connected with drive assembly.The utility model aims at providing a kind of anti-winding main brush structures for floor cleaning robot, can independently cut hair and debris wound on rolling brush, ensure that floor cleaning robot can long-acting work, and then improve the service life of complete machine.

Description

Technical Field

[0001] This utility model relates to the field of automatic cleaning equipment technology, and in particular to an anti-tangling main brush structure for a sweeping robot. Background Technology

[0002] The main brush structure of a robotic vacuum cleaner, also known as a roller brush or cleaning module, is one of the core cleaning components of the robot. It acts like the robot's "cleaning arm," sweeping up and lifting dust, hair, and debris from the floor through high-speed rotation. At the same time, the suction generated by the fan guides the debris to the suction port and into the dust collection box.

[0003] However, in most robotic vacuum cleaners, hair and debris tend to entangle and accumulate on the roller brush surface after prolonged use. This not only clogs the suction port, significantly reducing cleaning efficiency, but can also hinder the normal rotation of the main brush, affecting the robot's continuous operation. In severe cases, entanglement can cause the main brush to jam, thereby damaging the motor and shortening the overall lifespan of the machine. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-tangling main brush structure for a sweeping robot, which can autonomously cut hair and debris tangled on the roller brush, ensuring that the sweeping robot can work for a long time and thus improving the service life of the whole machine.

[0005] The purpose of this utility model is achieved by the following technical solution: an anti-tangling main brush structure for a sweeping robot, comprising: a drive component, a roller brush component, a cutting component, and a control system;

[0006] The drive assembly includes a motor and a rotating shaft connected sequentially along the power transmission direction;

[0007] The roller brush assembly extends along the length of the rotating shaft, and the roller brush assembly is linked to the rotating shaft to rotate with the rotating shaft.

[0008] The cutting assembly includes a one-way bearing, a support bracket, and a blade; the inner ring of the one-way bearing is fixedly sleeved on the rotating shaft, the support bracket is fixedly sleeved on the outer ring of the one-way bearing, the blade extends along the length direction of the support bracket, the thickness of the cutting surface of the blade gradually decreases from the back of the blade to the cutting edge, the support bracket extends along the length direction of the roller brush assembly, and the support bracket is movably sleeved on the outside of the rotating shaft;

[0009] The control system is electrically connected to the drive assembly.

[0010] Furthermore, the support frame includes a first support plate, a support beam, and a second support plate connected sequentially along the length direction of the support frame. The first support plate is sleeved on the outer ring of the one-way bearing. The support beam has a positioning groove that extends along the length direction of the support beam and engages with the blade.

[0011] Furthermore, the cutting assembly also includes an end face cam, which is linked to the rotating shaft. The second support plate is connected to a follower, which is slidably connected to the end face cam, so that the end face cam can push the second support plate to move closer to the one-way bearing.

[0012] Furthermore, the end face cam is provided with an annular groove, and the follower engages with the annular groove.

[0013] Furthermore, the cutting assembly also includes an elastic reset member, which includes an auxiliary reset plate and a spring. The auxiliary reset plate is movably sleeved on the rotating shaft, with one end of the auxiliary reset plate abutting against one end of the one-way bearing, and both ends of the spring elastically abutting against the first support plate and the auxiliary reset plate, respectively.

[0014] Furthermore, the springs are multiple, and the multiple springs are distributed at intervals around the axis of the rotating shaft.

[0015] Furthermore, the drive assembly also includes an encoder, and the motor has a receiving cavity in which the encoder is disposed.

[0016] Furthermore, the anti-tangling main brush structure for a sweeping robot also includes a limiting bushing, which is movably sleeved on the rotating shaft, and one end of the limiting bushing abuts against the auxiliary reset plate to fix the auxiliary reset plate.

[0017] Furthermore, the roller brush assembly includes a brush sleeve and a plurality of brushes. The brush sleeve is fitted onto the rotating shaft, and the brushes are supported by the brush sleeve. The plurality of brushes are distributed at intervals around the axis of the rotating shaft, and the bristles of the brushes are made of a flexible material.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Based on the fact that the drive assembly includes a motor and a rotating shaft connected sequentially along the power transmission direction; it can be understood that the drive assembly provides power to the roller brush assembly and the cutting assembly, drives the roller brush assembly to rotate and sweep the ground, and controls the rotation or locking of the cutting assembly to cut the hair fragments wrapped around the roller brush assembly. The motor needs to meet the requirements of frequent forward and reverse rotation. A brushless DC motor is preferred, but a brushed DC motor or a servo motor can also be used. The advantage of a brushless DC motor is that it can not only execute the complex command of "forward rotation - instantaneous reverse rotation - return to forward rotation" quickly and accurately, but also has the advantages of long life and low noise, which can improve the durability and practicality of the anti-tangling main brush structure.

[0020] 2. Based on the fact that the roller brush assembly extends along the length of the rotating shaft, and the roller brush assembly is linked to the rotating shaft to rotate with the rotating shaft; it can be understood that the roller brush assembly is sleeved on the rotating shaft, and the motor drives the rotating shaft to rotate forward. At this time, the main brush structure is in the active cleaning mode. The rotating shaft drives the roller brush assembly to rotate and adsorb dust and impurities. At this time, hair and debris gradually adhere to and become entangled on the surface of the roller brush assembly. As the amount of hair and debris increases, the resistance increases. Therefore, the motor needs more power to drive the rotating shaft to rotate forward, so the working current increases accordingly. When the working current reaches the preset reverse value, the motor drives the rotating shaft to rotate in reverse, and the roller brush assembly rotates in reverse to start entering the anti-entanglement cutting mode. After the cutting is completed, the working current drops below the reverse threshold. At this time, the main brush structure will rotate forward again and return to the active cleaning mode, realizing the automatic switching of the working mode.

[0021] 3. The cutting assembly includes a one-way bearing, a support bracket, and a blade; the inner ring of the one-way bearing is fixedly sleeved on the rotating shaft, the support bracket is fixedly sleeved on the outer ring of the one-way bearing, the blade extends along the length of the support bracket, and the thickness of the cutting surface of the blade gradually decreases from the back of the blade to the cutting edge. The support bracket extends along the length of the roller brush assembly. It can be understood that when the rotating shaft rotates clockwise, the cutting assembly rotates clockwise with the shaft. Although the blade is in contact with the roller brush assembly at this time, since both the blade and the roller brush assembly are rotating clockwise, they are in a relatively stationary state, and therefore the blade cannot effectively cut the tangled material. When the rotating shaft rotates counterclockwise, the roller brush assembly rotates counterclockwise with the shaft, and the one-way bearing slips. Therefore, the motor power cannot be transmitted to the support bracket and the blade, and the support bracket and the blade are in a locked state. At this time, the tangled material on the roller brush rotates and collides with the stationary blade, achieving the purpose of cutting. The cut debris is guided by the rotating roller brush assembly to the dust collection box. It should be noted that the blade has an inclined cutting edge, which can both guide the bristles on the roller brush assembly and improve the cutting efficiency of the tangled material by increasing the sharpness of the blade.

[0022] 4. Based on the electrical connection between the control system and the drive component, it can be understood that the control system is a control panel installed on the shell of the sweeping robot. By preset the threshold of the working current on the control system, the control system can accurately control the start, stop, direction and speed of the motor, thereby improving the reliability of the anti-tangling main brush structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an anti-tangling main brush structure for a sweeping robot according to the present invention; wherein: the disc component is the outer shell of the sweeping robot;

[0024] Figure 2 for Figure 1 The diagram shows a structural schematic of an anti-tangling main brush structure for a robotic vacuum cleaner, wherein the control system is hidden.

[0025] Figure 3 for Figure 2 The sectional view shown;

[0026] Figure 4 This is a fracture view of the cutting component of this utility model;

[0027] Figure 5 for Figure 4 A cross-sectional view of the cut component shown;

[0028] Figure 6 for Figure 2 The diagram shows the structure of the roller brush assembly.

[0029] In the diagram: 1. Drive assembly; 11. Motor; 111. Accommodating cavity; 12. Rotating shaft; 13. Encoder; 2. Roller brush assembly; 21. Brush sleeve; 22. Brush; 3. Cutting assembly; 31. One-way bearing; 32. Support bracket; 321. First support plate; 322. Support beam; 323. Second support plate; 33. Blade; 4. Control system; 5. Positioning groove; 6. End face cam; 61. Annular groove; 7. Follower; 8. Elastic reset component; 81. Auxiliary reset plate; 82. Spring; 9. Limit bushing. Detailed Implementation

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides an anti-tangling main brush structure for a sweeping robot, comprising: a drive assembly 1, a roller brush assembly 2, a cutting assembly 3, and a control system 4.

[0034] The drive assembly 1 includes a motor 11 and a rotating shaft 12 connected sequentially along the power transmission direction;

[0035] The roller brush assembly 2 extends along the length direction of the rotating shaft 12, and the roller brush assembly 2 is linked to the rotating shaft 12 to rotate with the rotating shaft 12;

[0036] The cutting assembly 3 includes a one-way bearing 31, a support frame 32, and a blade 33; the inner ring of the one-way bearing 31 is fixedly sleeved on the rotating shaft 12, the support frame 32 is fixedly sleeved on the outer ring of the one-way bearing 31, the blade 33 extends along the length direction of the support frame 32, the thickness of the cutting surface of the blade 33 gradually decreases from the back of the blade to the cutting edge, the support frame 32 extends along the length direction of the roller brush assembly 2, and the support frame 32 is movably sleeved on the outside of the rotating shaft 12;

[0037] The control system 4 is electrically connected to the drive component 1.

[0038] The working principle of this utility model is as follows: During normal cleaning, the motor 11 rotates forward, simultaneously driving the roller brush assembly 2 to rotate via the rotating shaft 12 for cleaning. The blade 33 of the cutting assembly 3 rotates synchronously via the one-way bearing 31. At this time, the blade 33 has no relative movement with the roller brush assembly 2 and does not perform cutting. As cleaning progresses, hair and other debris gradually become entangled on the roller brush assembly 2, increasing the load and raising the operating current of the motor 11. When the current reaches a preset threshold, the control system 4 issues a command to reverse the motor 11.

[0039] When motor 11 reverses, shaft 12 drives roller brush assembly 2 to rotate in the opposite direction. The one-way bearing 31 in cutting assembly 3 slips due to the reverse rotation, cutting off power transmission and keeping support frame 32 and blade 33 stationary. At this time, the counter-rotating roller brush assembly 2 continuously flings the tangled material onto the stationary blade 33, effectively cutting the material using the intense relative motion and shearing force generated between them. The cut debris is then sent to the dust collection box by roller brush assembly 2. Once cutting is complete, the load is reduced, and the operating current drops below the threshold. Control system 4 then controls motor 11 to resume forward rotation, and the entire main brush structure resumes synchronous rotation, re-entering the cleaning mode. This achieves automatic, cyclical switching between cleaning and anti-tangling cutting modes.

[0040] Based on the fact that the drive assembly 1 includes a motor 11 and a rotating shaft 12 connected sequentially along the power transmission direction, it can be understood that the drive assembly 1 provides power to the roller brush assembly 2 and the cutting assembly 3, drives the roller brush assembly 2 to rotate and sweep the ground, and controls the rotation or locking of the cutting assembly 3 to cut the hair fragments wrapped around the roller brush assembly 2. The motor 11 needs to meet the requirements of frequent forward and reverse rotation. It is preferred to use a brushless DC motor 11, but a brushed DC motor 11 or a servo motor 11 can also be used. The advantage of the brushless DC motor 11 is that it can not only execute the complex command of "forward rotation - instant reverse rotation - return to forward rotation" quickly and accurately, but also has the advantages of long life and low noise, which can improve the durability and practicality of the anti-tangling main brush structure.

[0041] Based on the fact that the roller brush assembly 2 extends along the length of the rotating shaft 12, the roller brush assembly 2 is linked to the rotating shaft 12 to rotate with the rotating shaft 12; it can be understood that the roller brush assembly 2 is sleeved on the rotating shaft 12, and the motor 11 drives the rotating shaft 12 to rotate forward. At this time, the main brush structure is in the active cleaning mode. The rotating shaft 12 drives the roller brush assembly 2 to rotate and adsorb dust and impurities. At this time, the surface of the roller brush assembly 2 gradually adheres to and wraps with hair and debris. As the amount of hair and debris increases, the resistance increases. Therefore, the motor 11 needs more power to drive the rotating shaft 12 to rotate forward, so the working current increases accordingly. When the working current reaches the preset reverse threshold, the motor 11 drives the rotating shaft 12 to rotate in reverse, and the roller brush assembly 2 rotates in reverse to start entering the anti-tangling cutting mode. After the cutting is completed, the working current drops below the reverse threshold. At this time, the main brush structure will rotate forward again and return to the active cleaning mode, realizing the automatic switching of the working mode.

[0042] The cutting assembly 3 includes a one-way bearing 31, a support frame 32, and a blade 33. The inner ring of the one-way bearing 31 is fixedly sleeved on the rotating shaft 12, and the support frame 32 is fixedly sleeved on the outer ring of the one-way bearing 31. The blade 33 extends along the length of the support frame 32, and the thickness of the cutting surface of the blade 33 gradually decreases from the back of the blade to the cutting edge. The support frame 32 extends along the length of the roller brush assembly 2 and is movably sleeved on the outside of the rotating shaft 12. It can be understood that when the rotating shaft 12 rotates clockwise, the cutting assembly 3 rotates clockwise with the rotating shaft 12. At this time, although the blade 33 is in contact with the roller brush assembly 2, since both the blade 33 and the roller brush assembly 2 are rotating clockwise, the blade 33 and the roller brush assembly 2 are in a relatively stationary state, and therefore the blade 33 cannot effectively cut the tangled material. When the rotating shaft 12 rotates counterclockwise, the roller brush assembly 2 rotates counterclockwise with the rotating shaft 12, and the one-way bearing 31 then enters a slipping state. Therefore, the power of the motor 11 cannot be transmitted to the support 32 and the blade 33, and the support 32 and the blade 33 are in a locked state. At this time, the entangled material on the roller brush rotates and collides with the stationary blade 33, achieving the purpose of cutting. The cut debris is guided by the roller brush assembly 2 to the dust collection box. It should be noted that the blade 33 has an inclined cutting surface, which can both guide the bristles on the roller brush assembly 2 and improve the cutting efficiency of the entangled material by increasing the sharpness of the blade.

[0043] Based on the fact that the control system 4 is electrically connected to the drive component 1, it can be understood that the control system 4 is a control panel installed on the shell of the sweeping robot. By preset the threshold of the working current on the control system 4, the control system 4 can accurately control the start, stop, direction and speed of the motor 11, thereby improving the reliability of the anti-tangling main brush structure.

[0044] like Figures 4 to 5 As shown, preferably, the support frame 32 includes a first support plate 321, a support beam 322, and a second support plate 323 connected sequentially along the length of the support frame 32. The first support plate 321 is sleeved on the outer ring of the one-way bearing 31. The support beam 322 has a positioning groove 5 extending along the length of the support beam 322, and the positioning groove 5 cooperates with the blade 33. It can be understood that the first support plate 321, the support beam 322, and the second support plate 323 can be integrally formed or detachably connected (e.g., groove connection, key connection). The blade 33 is assembled in the positioning groove 5 and supported by the support beam 322. As an alternative, the blade 33 can also be welded to the support beam 322.

[0045] like Figures 2 to 4As shown, preferably, the cutting assembly 3 further includes an end face cam 6, which is linked to the rotating shaft 12. A follower 7 is connected to the second support plate 323, and the follower 7 is slidably connected to the end face cam 6, allowing the end face cam 6 to push the second support plate 323 towards the one-way bearing 31. It can be understood that the end face cam 6 can rotate clockwise or counterclockwise with the rotating shaft 12. When the end face cam 6 rotates clockwise, it is relatively stationary with the follower 7, and at this time, the end face cam 6 does not press against the follower 7. When the end face cam 6 rotates counterclockwise, both the support frame 32 and the follower 7 are stationary. At this time, the protruding end of the end face cam 6 abuts against the follower 7, pushing the support frame 32 to move axially, enabling the blade 33 to cut the entangled material axially, further improving the working efficiency of the cutting assembly 3. The follower 7 can be a separate protrusion or a protrusion on the second support plate 323.

[0046] like Figure 4 As shown, preferably, the end face cam 6 is provided with an annular groove 61, and the follower 7 cooperates with the annular groove 61. It can be understood that, compared with the connection method where the end face cam 6 and the follower 7 abut against each other, this design method can avoid slippage between the end face cam 6 and the follower 7, and further improve the stability of the end face cam 6 pushing the support bracket 32.

[0047] like Figure 4 As shown, preferably, the cutting assembly 3 further includes an elastic reset member 8, which includes an auxiliary reset plate 81 and a spring 82. The auxiliary reset plate 81 is movably sleeved on the rotating shaft 12, with one end of the auxiliary reset plate 81 abutting against one end of the one-way bearing 31. The two ends of the spring 82 elastically abut against the first support plate 321 and the auxiliary reset plate 81, respectively. It is understood that when the support frame 32 is pushed and moves axially, it will not return on its own. Therefore, the elastic reset member 8 is introduced. When the end face cam 6 abuts against the follower 7 and gradually pushes the support frame 32, the first support plate 321 gradually compresses the spring 82. When the end face cam 6 and the follower 7 are no longer in contact, the force on the support frame 32 disappears, and the spring 82 rebounds, pushing the support frame 32 back to its original position. This not only achieves the cyclic axial movement of the support frame 32 but also enables the blade 33 to perform secondary axial cutting on the wound material, further improving cutting efficiency. It should be noted that because the auxiliary reset plate 81 is movably sleeved with the rotating shaft 12, the elastic reset element 8 will not rotate clockwise or counterclockwise with the rotating shaft 12; see [link to relevant documentation]. Figure 3 At this time, the first support plate 321, the spring 82 and the auxiliary reset plate 81 together form a structure similar to a bearing seat hole to limit the axial slippage of the one-way bearing 31.

[0048] like Figure 4As shown, preferably, there are multiple springs 82, which are distributed at intervals around the axis of the rotating shaft 12. It can be understood that providing multiple springs 82 ensures uniform force application and prevents the support bracket 32 ​​from jamming or experiencing uneven wear.

[0049] like Figure 3 As shown, preferably, the drive assembly 1 further includes an encoder 13, and the motor 11 has a receiving cavity 111, with the encoder 13 disposed within the receiving cavity 111. It is understood that the system cannot perceive the actual phase of the end face cam 6 based solely on the operating current. When the motor 11 current drops below the reverse threshold and switches back to forward rotation, the support 32 and the blade 33 may not have fully reset, resulting in insufficient unwinding stroke or mechanical interference in the next operation.

[0050] By adding an encoder 13 and electrically connecting it to the control system 4, precise control of the motor 11's rotation angle can be achieved. The return reference point of the end face cam 6 is pre-calibrated in the control system 4. During the process of the motor 11 switching from reverse to forward rotation, the control system 4, based on the real-time angle signal fed back by the encoder 13, does not immediately enter the normal cleaning speed, but first controls the motor 11 to precisely position itself to this reference point. This operation ensures that the support bracket 32 ​​is fully reset. Subsequently, the motor 11 accelerates to the normal operating speed. By introducing the encoder 13, the reset uncertainty caused by the working current control is eliminated, ensuring that the support bracket 32 ​​can be fully reset after each unwinding action.

[0051] like Figure 3 As shown, preferably, the anti-tangling main brush structure for a robotic vacuum cleaner further includes a limiting bushing 9, which is movably sleeved on the rotating shaft 12. One end of the limiting bushing 9 abuts against the auxiliary reset plate 81 to fix the auxiliary reset plate 81. It can be understood that the other end of the limiting bushing 9 abuts against the housing of the robotic vacuum cleaner to limit the movement of the auxiliary reset plate 81.

[0052] like Figure 6 As shown, preferably, the roller brush assembly 2 includes a brush sleeve 21 and a plurality of brushes 22. The brush sleeve 21 is fitted onto the rotating shaft 12, and the brushes 22 are supported by the brush sleeve 21. The plurality of brushes 22 are distributed at intervals around the axis of the rotating shaft 12, and the bristles of the brushes 22 are made of a flexible material. It is understood that if entanglement adheres to the brushes 22, the blade 33 may easily cause "accidental injury" when scraping the hard bristles. The flexible bristles (such as silicone) are bent when they come into contact with the blade 33, thereby reducing wear on the brushes 22.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0054] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An anti-tangling main brush structure for a robotic vacuum cleaner, characterized in that, include: The drive assembly (1) includes a motor (11) and a rotating shaft (12) connected sequentially along the power transmission direction. A roller brush assembly (2) extends along the length of the rotating shaft (12) and is linked to the rotating shaft (12) to rotate with the rotating shaft (12); The cutting assembly (3) includes a one-way bearing (31), a support frame (32), and a blade (33). The inner ring of the one-way bearing (31) is fixedly sleeved on the rotating shaft (12), and the support frame (32) is fixedly sleeved on the outer ring of the one-way bearing (31). The blade (33) extends along the length direction of the support frame (32), and the thickness of the cutting surface of the blade (33) gradually decreases from the back of the blade to the cutting edge. The support frame (32) extends along the length direction of the roller brush assembly (2) and is movably sleeved on the outside of the rotating shaft (12). The control system (4) is electrically connected to the drive component (1).

2. The anti-tangling main brush structure for a sweeping robot according to claim 1, characterized in that: The support frame (32) includes a first support plate (321), a support beam (322), and a second support plate (323) connected sequentially along the length of the support frame (32). The first support plate (321) is sleeved on the outer ring of the one-way bearing (31). The support beam (322) has a positioning groove (5) that extends along the length of the support beam (322) and engages with the blade (33).

3. The anti-tangling main brush structure for a sweeping robot according to claim 2, characterized in that: The cutting assembly (3) further includes an end face cam (6), which is linked to the rotating shaft (12). The second support plate (323) is connected to a follower (7), which is slidably connected to the end face cam (6) so that the end face cam (6) can push the second support plate (323) to move closer to the one-way bearing (31).

4. The anti-tangling main brush structure for a sweeping robot according to claim 3, characterized in that: The end face cam (6) is provided with an annular groove (61), and the follower (7) cooperates with the annular groove (61).

5. The anti-tangling main brush structure for a sweeping robot according to claim 4, characterized in that: The cutting assembly (3) further includes an elastic reset member (8), which includes an auxiliary reset plate (81) and a spring (82). The auxiliary reset plate (81) is movably sleeved on the rotating shaft (12). One end of the auxiliary reset plate (81) abuts against one end of the one-way bearing (31), and both ends of the spring (82) elastically abut against the first support plate (321) and the auxiliary reset plate (81), respectively.

6. The anti-tangling main brush structure for a sweeping robot according to claim 5, characterized in that: The springs (82) are multiple, and the multiple springs (82) are distributed at intervals around the axis of the rotating shaft (12).

7. The anti-tangling main brush structure for a sweeping robot according to claim 1, characterized in that: The drive assembly (1) further includes an encoder (13), the motor (11) has a receiving cavity (111), and the encoder (13) is disposed in the receiving cavity (111).

8. The anti-tangling main brush structure for a sweeping robot according to claim 5, characterized in that: The anti-tangling main brush structure for a sweeping robot also includes a limiting bushing (9), which is movably sleeved on the rotating shaft (12). One end of the limiting bushing (9) abuts against the auxiliary reset plate (81) to fix the auxiliary reset plate (81).

9. The anti-tangling main brush structure for a sweeping robot according to claim 1, characterized in that: The roller brush assembly (2) includes a brush sleeve (21) and a plurality of brushes (22). The brush sleeve (21) is fitted onto the rotating shaft (12). The brushes (22) are supported by the brush sleeve (21). The plurality of brushes (22) are distributed at intervals around the axis of the rotating shaft (12). The bristles of the brushes (22) are made of a flexible material.

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