Rolling brush device and sweeping robot

Abstract

The utility model discloses a rolling brush device and a sweeping robot, and relates to the technical field of sweeping robots. One end of the middle sweeping shaft assembly is fixedly assembled on the driving assembly, and the other end of the middle sweeping shaft assembly is rotationally assembled on the fixing assembly. The middle sweeping rolling brush is fixedly arranged on the middle sweeping shaft assembly in a sleeving mode. The shearing assembly is assembled in the middle sweeping rolling brush, fixedly assembled on the middle sweeping shaft assembly and rotationally arranged on the fixing assembly in a sleeving mode. The middle sweeping rolling brush comprises a sweeping part, a gathering part and a spiral piece, when the driving assembly drives the middle sweeping shaft assembly to rotate, the spiral piece on the middle sweeping rolling brush is driven to sweep foreign matter wound on the ground, the spiral piece drives the foreign matter to move from the sweeping part to the gathering part, and the shearing assembly conducts axial reciprocating motion to shear the foreign matter on the gathering part. By the adoption of the technical scheme, the foreign matter shearing device has the advantages that foreign matter can be thoroughly sheared, the working and cleaning efficiency is improved, the later sweeping effect is not affected, and the damage risk is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sweeping robots, and in particular to a roller brush device and a sweeping robot. Background Art

[0002] With the advancement of technology and the development of smart homes, robot vacuums have become an essential tool for daily cleaning in many households. The primary function of a robot vacuum is to automatically remove dust, debris, and other debris from the floor using a built-in brush and other cleaning components. Early robot vacuums, to address the cleaning challenges of specialized foreign objects such as hair, lint, and other elongated objects, simply installed blades on the brush, attempting to resolve the hair entanglement issue through mechanical cutting. However, the blades on the brushes were unable to completely sever all hair entangled in the brush, resulting in poor cleaning results. The presence of blades increased the risk of scratching or damaging soft floor coverings like carpets, and the blades could be impacted when encountering obstacles, potentially damaging or deforming the blades. This compromised the brush's efficiency, preventing hair and lint from being effectively removed, reducing cleaning efficiency and impacting the robot's subsequent cleaning performance, ultimately reducing the user experience. Utility Model Content

[0003] The purpose of the present utility model is to address the defects and shortcomings of the existing technology and provide a roller brush device and a sweeping robot, which have the advantages of being able to completely cut off foreign matter, improve work efficiency and cleaning efficiency without affecting the subsequent cleaning effect, and avoid the risk of damage.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a roller brush device, comprising:

[0005] The shell is provided with an opening slot;

[0006] a drive assembly assembled in the housing;

[0007] a fixed assembly, fixedly assembled in the housing;

[0008] a middle sweep shaft assembly, one end of which is fixedly assembled on the driving assembly and the other end of which is rotatably assembled on the fixing assembly;

[0009] a middle sweep roller brush, fixedly sleeved on the middle sweep shaft assembly and arranged on one side of the opening slot, the middle sweep roller brush being used to wrap around foreign objects on the ground; and

[0010] A shearing assembly is assembled in the middle sweep roller brush, fixedly assembled on the middle sweep shaft assembly, and rotatably sleeved on the fixed assembly. The shearing assembly performs axial reciprocating movement to shear foreign matter;

[0011] The middle sweep roller brush comprises: a cleaning portion provided at one end of the middle sweep roller brush, a gathering portion provided at the other end of the middle sweep roller brush, close to one side of the shearing assembly, and gradually inclined with respect to the cleaning portion, and a spiral member provided on the surface of the middle sweep roller brush, the spiral member being used to wrap around foreign matter;

[0012] When the driving component drives the middle sweep shaft to rotate, it drives the spiral part on the middle sweep roller brush to clean the foreign objects entangled on the ground. The spiral part drives the foreign objects to move from the cleaning part to the gathering part, and the shearing component moves axially back and forth to shear the foreign objects on the gathering part.

[0013] The present invention is further provided with that the diameter of the cleaning portion is larger than the diameter of the gathering portion.

[0014] The present invention is further provided that the fixing assembly includes: an eccentric wheel fixed shaft passing through the shearing assembly, and a fixing member fixedly assembled between the housing and the eccentric wheel fixed shaft.

[0015] The utility model is further provided that the shearing assembly includes: a sleeve connected to the middle sweeping shaft assembly, and a cutter assembly assembled in the sleeve and rotating in cooperation with the eccentric wheel fixed axis; a shearing opening is provided on the sleeve for exposing the active end of the cutter assembly.

[0016] The present invention is further provided with the cutter assembly comprising: a first cutter piece fixedly mounted in the shaft sleeve, a second cutter piece mounted in the shaft sleeve and reciprocating relative to the first cutter piece, and a pressure piece spring mounted on the second cutter piece and passing through the first cutter piece and the second cutter piece.

[0017] The utility model is further provided with the second cutting piece facing away from the first cutting piece and passing through the cutting pressing piece provided on the first cutting piece and the second cutting piece;

[0018] A protrusion is provided on the side of the cutter pressure piece facing the eccentric wheel fixed shaft, and an eccentric groove is provided on the eccentric wheel fixed shaft for the protrusion to rotate with. When the protrusion rotates around the eccentric groove, it drives the cutter pressure piece on the second cutter piece to reciprocate relative to the first cutter piece.

[0019] The utility model is further provided that the cutter pressure piece further comprises: a sliding piece arranged away from the fixed axis of the eccentric wheel, and a sliding groove arranged towards the fixed axis of the eccentric wheel and slidingly cooperating with the spring piece of the pressure piece;

[0020] When the second cutter piece reciprocates relative to the first cutter piece, the first cutter piece is provided with a first avoidance hole for avoiding the sliding piece, and the second cutter piece is provided with a second avoidance hole for avoiding the pressing piece spring.

[0021] The present invention is further provided with a pressing buckle on the pressing piece spring sheet, and a blocking groove for fastening the pressing buckle is provided on the first cutting piece.

[0022] The utility model is further provided with a clamping portion on the middle sweep shaft assembly, and a clamping groove for fastening the clamping portion is also provided in the middle sweep roller brush.

[0023] To achieve the above-mentioned purpose, another technical solution adopted by the present invention is: a sweeping robot, comprising: a main shell, and the roller brush device as described above, which is assembled on the main shell.

[0024] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: in the utility model, a middle sweep shaft assembly and a middle sweep roller brush fixedly assembled on the middle sweep shaft assembly are provided, and a shearing assembly is also provided in the middle sweep roller brush, wherein the shell is provided with an open groove, and the middle sweep roller brush is placed at the open groove, and the spiral member on the middle sweep roller brush is used to wrap around foreign matter on the ground, and since the cleaning portion and the gathering portion are gradually inclined, the foreign matter on the spiral member moves from the cleaning portion to the gathering portion, and the gathering portion is close to the shearing assembly, which helps to process foreign matter more concentratedly, and a fixed assembly for rotating with the shearing assembly is further provided in the shell, and the shearing assembly performs axial reciprocating movement to shear foreign matter, so that when the driving assembly drives the middle sweep shaft assembly to rotate, the middle sweep shaft assembly drives the spiral member on the surface of the middle sweep roller brush to clean the foreign matter wrapped around the ground, and then the rotation of the spiral member drives the foreign matter to move from the cleaning portion to the gathering portion, and the shearing assembly performs axial reciprocating movement to shear the foreign matter on the gathering portion, thereby achieving thorough shearing of foreign matter and improving cleaning efficiency. Therefore, the roller brush device has the advantages of being able to completely cut off foreign matter, improving work efficiency and cleaning efficiency without affecting the subsequent cleaning effect, and avoiding the risk of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 It is a structural diagram of a roller brush device;

[0027] Figure 2This is a structural exploded diagram of the roller brush device from one perspective;

[0028] Figure 3 This is a structural explosion diagram of the roller brush device from another perspective;

[0029] Figure 4 This is an exploded structural diagram of the roller brush device from another perspective;

[0030] Figure 5 It is a structural explosion diagram from the perspective of fixed components and shear components;

[0031] Figure 6 This is a structural explosion diagram of the fixed component and the shear component from another perspective;

[0032] Figure 7 It is a schematic diagram of the explosion of the structure of the middle sweep roller brush from the side.

[0033] Explanation of reference numerals: 100, housing; 110, opening slot; 120, fan port; 200, driving assembly; 210, driving device; 220, gear transmission device; 300, fixing assembly; 310, eccentric wheel fixed shaft; 311, eccentric slot; 312, avoidance slot; 320, fixing member; 400, middle sweep shaft assembly; 410, clamping portion; 420, middle sweep filling foam; 500, middle sweep roller brush; 510, cleaning portion; 520, gathering part; 530, spiral part; 540, snap-in groove; 600, shearing assembly; 610, bushing; 611, shearing notch; 620, first cutting piece; 621, first avoidance hole; 622, blocking groove; 630, second cutting piece; 631, cutting piece; 6311, raised part; 6312, sliding piece; 6313, sliding groove; 632, second avoidance hole; 640, pressing piece spring; 641, tightening buckle. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0036] This embodiment relates to a roller brush device, referring to Figures 1-4 , including: a shell 100, a driving assembly 200, a fixing assembly 300, a middle sweep shaft assembly 400, a middle sweep roller brush 500 and a shearing assembly 600.

[0037] Among them, the shell 100 is provided with an open groove 110, and the middle sweep roller brush 500 contacts the ground through the open groove 110 during the cleaning process to draw in foreign objects (hair, thread ends and other slender objects) to achieve a cleaning effect. The shell 100 is also provided with a fan port 120, which is connected to the dust suction system. The negative pressure generated by the fan is used to absorb dust and fine particles on the ground. It can also absorb the fragments after the shearing component 600 shears the foreign objects on the middle sweep roller brush 500 to avoid scattering again, ensuring a more comprehensive cleaning effect. The drive component 200 is assembled in the shell 100 and provides a driving force generated by the power source for the cleaning and clearing process. The fixed component 300 is fixedly assembled in the shell 100, and the fixed component 300 cooperates with the shearing component 600 for transmission. The shearing component 600 rotates relative to the fixed component 300, so that the shearing component can move back and forth to cut foreign objects. One end of the middle sweep shaft assembly 400 is fixedly mounted on the drive assembly 200, and the other end is rotatably mounted on the fixed assembly 300, ensuring that the power of the drive assembly 200 is transmitted to the middle sweep shaft assembly 400. When the drive assembly 200 is running, it can directly drive the middle sweep shaft assembly 400 to rotate, thereby driving the middle sweep roller brush 500 to work. The fixed assembly 300 provides a support point for the middle sweep shaft assembly 400, ensuring that the middle sweep shaft assembly 400 can rotate smoothly. The middle sweep roller brush 500 is fixedly mounted on the middle sweep shaft assembly 400 and is arranged on one side of the open groove 110. The middle sweep roller brush 500 is used to wrap around foreign objects on the ground, ensuring that the roller brush does not slip or fall off during rotation, so that the roller brush can directly contact the ground and effectively pick up foreign objects on the ground. The shearing assembly 600 is assembled in the middle sweep roller brush 500, and will not accidentally cut the carpet. When working, there is no hardware of the shearing assembly 600 protruding from the shell 100, so it is not easy to hit obstacles and be damaged, which makes it safer during use. At the same time, it does not affect or reduce the brush strips of the roller brush. If the brush strips are reduced, the overall cleaning rate of the middle sweep roller brush 500 will be damaged. Specifically, one end of the shearing assembly 600 is fixedly assembled on the middle sweep shaft assembly 400, and the other end is rotatably mounted on the fixed assembly 300. The shearing assembly 600 performs axial reciprocating movement to shear foreign matter. The shearing assembly 600 can rotate relative to the fixed assembly 300 while the middle sweep shaft assembly 400 rotates. At this time, the shearing assembly 600 can perform axial reciprocating movement to shear foreign matter on the middle sweep roller brush 500. It effectively prevents foreign matter from being entangled on the roller brush, thereby avoiding the risk of equipment clogging or damage.

[0038] Reference Figure 4 、 Figure 7The middle sweep roller brush 500 includes: a cleaning portion 510, a gathering portion 520 and a spiral 530. The cleaning portion 510 is arranged at one end of the middle sweep roller brush 500, and is used to contact the ground and clean foreign matter on the ground. The gathering portion 520 is arranged at the other end of the middle sweep roller brush 500, close to the side of the shearing assembly 600, and is gradually inclined with the cleaning portion 510, so as to further concentrate the foreign matter rolled up by the cleaning portion 510 and moved along the surface of the roller brush, facilitate shearing processing, and help improve shearing efficiency. The spiral 530 is arranged on the surface of the middle sweep roller brush 500, and the spiral 530 is used to wrap around foreign matter. As the roller brush rotates, the foreign matter on the ground can be gradually transported to the gathering portion 520 of the middle sweep roller brush 500 along a spiral path. Thus, when the drive assembly 200 drives the middle sweep shaft assembly 400 to rotate, the middle sweep shaft assembly 400 drives the spiral member 530 on the surface of the middle sweep roller brush 500 to clean foreign matter entangled on the ground. The rotation of the spiral member 530 then drives the foreign matter from the cleaning portion 510 to the gathering portion 520. The shearing assembly 600 performs axial reciprocating movement to shear the foreign matter on the gathering portion 520, thereby completely shearing the foreign matter and improving cleaning efficiency. Therefore, the roller brush device has the advantages of being able to completely shear foreign matter, improving work efficiency and cleaning efficiency without affecting the subsequent cleaning effect, and avoiding the risk of damage.

[0039] In this embodiment, the diameter of the cleaning portion 510 is larger than the diameter of the gathering portion 520. As the middle sweep roller brush 500 rotates, foreign matter is drawn in by the spiral 530, and the cleaning portion 510 gradually becomes thinner towards the gathering portion 520. As the diameter decreases, the foreign matter will be naturally guided to the gathering portion 520, which can better concentrate the foreign matter. The larger cleaning portion 510 can provide a larger contact area during the cleaning process, which helps to more effectively capture and draw in foreign matter on the ground. As the middle sweep roller brush 500 rotates, foreign matter on the ground will be entangled by the spiral 530 and transported to the gathering portion 520. Since the diameter of the gathering portion 520 is smaller, this helps to form a natural "funnel effect", prompting foreign matter to gradually gather towards the gathering portion 520, making it easier for the shearing assembly 600 to handle and preventing incomplete shearing due to the foreign matter being too loose.

[0040] In this embodiment, referring to Figure 2-Figure 6 The fixing assembly 300 includes an eccentric fixed shaft 310 that passes through the shearing assembly 600 and a fixing member 320 that is fixedly assembled between the housing 100 and the eccentric fixed shaft 310. The eccentric fixed shaft 310 is characterized in that the central axis and the rotation axis are not in a straight line, that is, there is an eccentric distance. When the shearing assembly 600 rotates around the eccentric fixed shaft 310, the shearing assembly 600 in contact with it can generate periodic axial reciprocating motion. The fixing member 320 supports and fixes the eccentric fixed shaft 310, ensuring that the shearing assembly 600 performs smooth reciprocating motion without unnecessary displacement or shaking.

[0041] In this embodiment, referring to Figure 5-Figure 6 The shearing assembly 600 includes a sleeve 610 connected to the middle sweep shaft assembly 400 and a cutter assembly assembled within the sleeve 610 and rotating in conjunction with the eccentric fixed shaft 310. The sleeve 610 is connected to the middle sweep shaft assembly 400 and serves as a support structure for the cutter assembly. Rotation of the sleeve 610 drives the cutter assembly around the eccentric fixed shaft 310, causing the cutter assembly to reciprocate axially within the sleeve 610. The cooperation between the sleeve 610 and the cutter assembly effectively shears foreign matter. Furthermore, the sleeve 610 is provided with a shearing notch 611 for exposing the active end of the cutter assembly. The sleeve 610 is provided with a shearing notch 611. The position and size of the shearing notch 611 allow the active end of the cutter assembly to be exposed during the shearing process, facilitating direct shearing of foreign matter within the gathering portion 520. Specifically, in this embodiment, the cutter assembly utilizes double-ended shearing teeth, and the sleeve 610 is provided with two shearing notches 611 corresponding to the double-ended shearing teeth. This allows for thorough shearing of foreign matter, improving shearing efficiency. In other embodiments, the cutter assembly may utilize single-ended shearing teeth. Specifically, in this embodiment, the sleeve 610 is detachable, facilitating repairs should the cutter assembly experience malfunctions or other issues after prolonged use. In other embodiments, the sleeve 610 may utilize other assembly and connection methods.

[0042] In this embodiment, the cutter assembly includes a first cutter member 620, a second cutter member 630, and a pressure spring 640. The first cutter member 620 is fixedly mounted within the shaft sleeve 610, while the second cutter member 630 is mounted within the shaft sleeve 610 and reciprocates relative to the first cutter member 620. The pressure spring 640 is mounted on the first cutter member 620 and extends through both the first and second cutter members 620, 630. The second cutter member 630 cooperates with the fixed first cutter member 620 to shear away accumulated foreign matter at the shear cut 611 on the shaft sleeve 610. The pressure spring 640 provides appropriate elastic support, ensuring that the second cutter member 630 maintains stable contact pressure during its reciprocating motion.

[0043] In this embodiment, referring to Figure 5The second cutting element 630 faces away from the first cutting element 620 and penetrates the cutting pressure member 631 provided on the first and second cutting elements 620 and 630. The cutting pressure member 631 ensures appropriate contact pressure between the first and second cutting elements 620 and 630, ensuring the stability of the second cutting element 630 during reciprocating motion and improving cutting efficiency. Furthermore, a protrusion 6311 is provided on the side of the cutting pressure member 631 facing the eccentric fixed shaft 310. The eccentric fixed shaft 310 is provided with an eccentric groove 311 for the protrusion 6311 to rotate. When the protrusion 6311 rotates around the eccentric groove 311, it drives the cutting pressure member 631 on the second cutting element 630 to reciprocate relative to the first cutting element 620. The raised portion 6311 cooperates with the eccentric groove 311 on the eccentric, allowing the cutter pressure member 631 to rotate about the eccentric fixed axis 310 and reciprocate in the axial direction. This makes the reciprocating movement of the second cutter member 630 more stable and controllable, and the shearing action more continuous and smooth. This also ensures the consistency of force and position of each shearing action, thereby improving the efficiency and effectiveness of shearing. Specifically, the eccentric fixed axis 310 is also provided with a clearance groove 312 for circumventing the pressure member spring 640. The clearance groove 312 prevents the pressure member spring 640 from interfering with the eccentric fixed axis 310 when the second cutter member 630 rotates about the eccentric fixed axis 310. This ensures that the pressure member spring 640, while providing elastic support, does not hinder the normal reciprocating movement of the second cutter member 630.

[0044] In this embodiment, referring to Figure 5-Figure 6 The cutter pressure member 631 also includes a sliding member 6312 disposed on the side facing away from the eccentric fixed shaft 310, and a sliding groove 6313 disposed on the side facing the eccentric fixed shaft 310 and slidingly cooperating with the pressure member spring 640. The cooperation between the sliding member 6312 and the sliding groove 6313 ensures that the second cutter member 630 can slide smoothly during reciprocation, while also making the reciprocating motion of the second cutter member 630 more stable and reducing vibration or jamming caused by poor sliding. Specifically, when the second cutter member 630 reciprocates relative to the first cutter member 620, the first cutter member 620 is provided with a first avoidance hole 621 for avoiding the sliding member 6312, and the second cutter member 630 is provided with a second avoidance hole 632 for avoiding the pressure member spring 640. The first avoidance hole 621 and the second avoidance hole 632 prevent the sliding member 6312 and the pressure member spring 640 from interfering with the first cutter member 620 and the second cutter member 630 during movement, further ensuring the smoothness of the shearing action. At the same time, the avoidance holes optimize the mechanical structure layout, allowing the various components to work in coordination, thereby improving the overall compactness and space utilization.

[0045] In this embodiment, referring to Figure 6The pressure piece spring 640 is provided with a pressing buckle 641, and the first cutting member 620 is provided with a blocking groove 622 for locking the pressing buckle 641. The cooperation between the pressing buckle 641 and the blocking groove 622 ensures that the pressure piece spring 640 can be firmly fixed to the first cutting member 620, while preventing the pressure piece spring 640 from loosening due to reciprocating motion or other factors during the shearing process, thereby improving the structural stability of the shearing assembly 600.

[0046] In this embodiment, referring to Figure 4 、 Figure 7 The middle sweep shaft assembly 400 is provided with a clamping portion 410, and the middle sweep roller brush 500 is further provided with a clamping groove 540 for the clamping portion 410 to be fastened. The clamping portion 410 and the clamping groove 540 allow the middle sweep roller brush 500 to be securely mounted on the middle sweep shaft, effectively preventing the middle sweep roller brush 500 from loosening or falling off due to centrifugal force or other external forces during high-speed rotation, thereby improving the stability of the middle sweep roller brush 500 during operation.

[0047] Specifically in this embodiment, refer to Figure 3-Figure 4 , two groups of middle sweep filling foams 420 are sleeved on the middle sweep shaft assembly 400, and the two groups of middle sweep filling foams 420 are respectively sleeved on the two ends of the clamping part 410. The setting of the middle sweep filling foam 420 is to improve the cleaning performance of the sweeping robot. Specifically, the middle sweep filling foam 420 is assembled in the middle sweep roller brush 500. The presence of the middle sweep filling foam 420 makes the middle sweep roller brush 500 fit more closely to the ground during rotation, increasing the contact area between the roller brush and the ground, thereby improving the cleaning effect. At the same time, the middle sweep filling foam 420 can fill the gap between the middle sweep shaft assembly 400 and the middle sweep roller brush 500, reducing the shaking of the roller brush during rotation. In other embodiments of the present invention, the middle sweep shaft assembly 400 can also be sleeved with other fillers.

[0048] Specifically in this embodiment, refer to Figure 3 The drive assembly 200 includes a drive device 210 disposed within the housing 100, and a gear transmission device 220, one end of which is fixedly mounted on the output shaft of the drive device 210 and the other end of which is fixedly mounted on the middle sweep shaft assembly 400. The gear transmission device 220 provides stable power transmission, ensuring that the output shaft of the drive device 210 accurately transmits power to the middle sweep shaft assembly 400, thereby driving the rotation of the middle sweep roller brush 500. In other embodiments, the transmission device may also adopt other transmission methods, such as pulley drive.

[0049] This embodiment also relates to a sweeping robot, comprising: a main housing (not shown), and the above-described roller brush device assembled on the main housing.

[0050] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A roller brush device, characterized in that: include: The housing (100) is provided with an opening slot (110); A drive assembly (200) assembled in the housing (100); A fixing assembly (300) fixedly assembled in the housing (100); a middle sweeping shaft assembly (400), one end of which is fixedly assembled on the driving assembly (200) and the other end of which is rotatably assembled on the fixing assembly (300); a middle sweep roller brush (500) fixedly sleeved on the middle sweep shaft assembly (400) and arranged on one side of the opening slot (110); the middle sweep roller brush (500) is used to wrap around foreign matter on the ground; and A shearing assembly (600) is assembled in the middle sweeping roller brush (500), fixedly assembled on the middle sweeping shaft assembly (400), and rotatably sleeved on the fixed assembly (300). The shearing assembly (600) performs axial reciprocating movement to shear foreign matter. The middle sweep roller brush (500) comprises: a cleaning portion (510) arranged at one end of the middle sweep roller brush (500), a gathering portion (520) arranged at the other end of the middle sweep roller brush (500), close to the side of the shearing assembly (600), and gradually inclined with respect to the cleaning portion (510), and a spiral member (530) arranged on the surface of the middle sweep roller brush (500), wherein the spiral member (530) is used to wrap around foreign matter; When the driving assembly (200) drives the middle sweep shaft to rotate, it drives the spiral member (530) on the middle sweep roller brush (500) to clean foreign matter entangled on the ground. The spiral member (530) drives the foreign matter to move from the cleaning portion (510) to the gathering portion (520), and the shearing assembly (600) moves axially back and forth to shear the foreign matter on the gathering portion (520).

2. The roller brush device according to claim 1, characterized in that: The diameter of the cleaning portion (510) is greater than the diameter of the gathering portion (520).

3. The roller brush device according to claim 1, characterized in that: The fixing assembly (300) comprises: an eccentric wheel fixed shaft (310) passing through the shearing assembly (600), and a fixing member (320) fixedly assembled between the housing (100) and the eccentric wheel fixed shaft (310).

4. The roller brush device according to claim 3, characterized in that: The shearing assembly (600) comprises: a shaft sleeve (610) connected to the middle sweeping shaft assembly (400), and a cutter assembly assembled in the shaft sleeve (610) and rotating in conjunction with the eccentric wheel fixed shaft (310); a shearing notch (611) is provided on the shaft sleeve (610) for exposing the active end of the cutter assembly.

5. The roller brush device according to claim 4, characterized in that: The cutter assembly comprises: a first cutter member (620) fixedly mounted in the shaft sleeve (610), a second cutter member (630) mounted in the shaft sleeve (610) and reciprocating relative to the first cutter member (620), and a pressure piece spring (640) mounted on the second cutter member (630) and passing through the first cutter member (620) and the second cutter member (630).

6. The roller brush device according to claim 5, characterized in that: The second cutting blade (630) faces away from the first cutting blade (620) and is provided through a cutting blade pressing piece (631) provided on the first cutting blade (620) and the second cutting blade (630); The cutter pressing piece (631) is provided with a protrusion (6311) on one side facing the eccentric wheel fixed shaft (310), and the eccentric wheel fixed shaft (310) is provided with an eccentric groove (311) for the protrusion (6311) to rotate in cooperation. When the protrusion (6311) rotates around the eccentric groove (311), it drives the cutter pressing piece (631) on the second cutter piece (630) to move back and forth relative to the first cutter piece (620).

7. The roller brush device according to claim 6, characterized in that: The cutter pressing piece (631) further comprises: a sliding piece (6312) disposed on a side facing away from the eccentric wheel fixed shaft (310), and a sliding groove (6313) disposed on a side facing the eccentric wheel fixed shaft (310) and slidingly cooperating with the pressing piece spring piece (640); When the second cutting piece (630) moves back and forth relative to the first cutting piece (620), the first cutting piece (620) is provided with a first avoidance hole (621) for avoiding the sliding piece (6312), and the second cutting piece (630) is provided with a second avoidance hole (632) for avoiding the pressing piece spring (640).

8. The roller brush device according to claim 5, characterized in that: A pressing buckle (641) is provided on the pressing piece spring piece (640), and a blocking groove (622) for fastening the pressing buckle (641) is provided on the first cutting piece (620).

9. The roller brush device according to claim 1, characterized in that: The middle sweep shaft assembly (400) is provided with a clamping portion (410), and the middle sweep roller brush (500) is further provided with a clamping groove (540) for the clamping portion (410) to be fastened.

10. A sweeping robot, characterized in that: include: A main shell, and a roller brush device as described in any one of claims 1 to 9 assembled on the main shell.

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