Pole piece dust removal device

Abstract

The utility model relates to the technical field of battery pole piece surface dust removal equipment, in particular to a pole piece dust removal device. According to the pole piece dust removal device, the first driving assembly drives the conveying roller set to rotate so as to drive the pole piece to move along the conveying roller set, and the first passing roller in the conveying roller set abuts against the first surface of the pole piece. Besides, the first dust removal brush and the second dust removal brush are arranged in the first dust removal box at intervals in the horizontal direction, and the first dust removal brush and the second dust removal brush are arranged adjacent to the first passing roller, so that the first dust removal brush and the second dust removal brush can be in contact with the second surface of the pole piece; and the first dust removal brush and the second dust removal brush can perform dual dust removal on the second surface of the pole piece. And the first dust removal brush and the second dust removal brush are arranged at an interval in the horizontal direction, so that dust can be prevented from being brushed onto the second dust removal brush by the first dust removal brush, and the dust removal effect of the second dust removal brush is effectively prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece surface dust removal equipment, in particular to a pole piece dust removal device. Background Art

[0002] The battery's pole piece is a core component, and the cleanliness of its surface has a significant impact on the battery's performance and service life. Therefore, before assembly, a pole piece dust removal device is typically required to remove dust from the pole piece surface.

[0003] Existing electrode dust removal devices typically place two brushes in a brush box along the direction of gravity. When the electrode passes through the brush box, the two brushes can perform dual dust removal on the same surface of the electrode. However, this has the disadvantage that the top brush easily brushes dust onto the bottom brush, affecting the dust removal effect of the bottom brush. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a pole piece dust removal device to solve the problem in the prior art that interference occurs between the two brushes, thereby affecting the dust removal effect.

[0005] The electrode dust removal device provided by the embodiment of the present utility model includes: a conveying mechanism, which includes a conveying roller group and a first drive assembly, the conveying roller group includes a first roller, the first roller is used to abut the first surface of the electrode, and the first drive assembly is used to drive the conveying roller group to drive the electrode to move; a first dust removal mechanism, which includes a first dust removal box, a first dust removal assembly and a second drive assembly, the first dust removal assembly includes a first dust removal brush and a second dust removal brush arranged at intervals in the horizontal direction in the first dust removal box, the first dust removal brush and the second dust removal brush are both arranged adjacent to the first roller, so that the first dust removal brush and the second dust removal brush can both contact the second surface of the electrode; the second drive assembly is connected to the first dust removal brush and the second dust removal brush to drive the first dust removal brush and the second dust removal brush to rotate.

[0006] Optionally, the second drive assembly includes a first motor and a second motor, the first motor is connected to the first dust removal brush, and is used to drive the first dust removal brush to rotate away from the side of the bottom of the first dust removal box toward a position close to the second dust removal brush, and the second motor is connected to the second dust removal brush, and is used to drive the second dust removal brush to rotate away from the side of the bottom of the first dust removal box toward a position close to the first dust removal brush.

[0007] Optionally, a first opening is provided on a side of the first dust removal box away from the bottom of the box, and the first roller is at least partially accommodated in the first dust removal box through the first opening, so that the adjacent position of the first roller and the first dust removal brush, and the adjacent position of the first roller and the second dust removal brush are both located in the first dust removal box.

[0008] Optionally, the first dust removal box is provided with a second opening and a third opening connected to its internal space, the second opening and the third opening are arranged opposite to each other in the axial direction of the first roller, and the first roller is passed through the second opening and the third opening.

[0009] Optionally, the first dust removal brush and the second dust removal brush are cylindrical roller brushes.

[0010] Optionally, the bottom of the first dust removal box has a tendency to collapse in a direction away from the first roller.

[0011] Optionally, the dust removal mechanism further includes a third drive assembly, which is connected to the first dust removal box and is used to drive the first dust removal box to move closer to or away from the first roller.

[0012] Optionally, the pole piece dust removal device further includes a dust suction mechanism, the bottom of the first dust removal box is provided with a first opening, and the dust suction mechanism is connected to the first opening for sucking out dust in the first dust removal box.

[0013] Optionally, the pole piece dust removal device also includes a second dust removal mechanism, the second dust removal mechanism includes a second dust removal box, a second dust removal assembly and a fourth drive assembly, the second dust removal assembly includes a third dust removal brush and a fourth dust removal brush arranged in a horizontal direction at intervals in the second dust removal box, the conveying roller group also includes a second passing roller, the first passing roller is used to abut the second surface of the pole piece, the third dust removal brush and the fourth dust removal brush are both arranged adjacent to the first passing roller, so that the third dust removal brush and the fourth dust removal brush can both contact the first surface of the pole piece; the fourth drive assembly is connected to the third dust removal brush and the fourth dust removal brush to drive the third dust removal brush and the fourth dust removal brush to rotate.

[0014] Optionally, the fourth drive assembly includes a third motor and a fourth motor, the third motor is connected to the third dust removal brush, and is used to drive the third dust removal brush to rotate away from one side of the bottom of the second dust removal box toward a position close to the fourth dust removal brush, and the fourth motor is connected to the fourth dust removal brush, and is used to drive the fourth dust removal brush to rotate away from one side of the bottom of the second dust removal box toward a position close to the third dust removal brush.

[0015] Compared to the prior art, the electrode dust removal device provided by the present invention has the following advantages: the electrode dust removal device drives the conveyor roller assembly to rotate via a first drive assembly, thereby driving the electrode to move along the conveyor roller assembly, and the first roller in the conveyor roller assembly abuts the first surface of the electrode. In addition, a first dust brush and a second dust brush are arranged horizontally at intervals in the first dust box, and the first dust brush and the second dust brush are arranged adjacent to the first roller, so that the first dust brush and the second dust brush can both contact the second surface of the electrode. The first and second dust brushes are driven to rotate by the second drive assembly, and the first drive assembly drives the first roller to rotate, thereby gradually moving the entire second surface of the electrode to the first roller, allowing the first dust brush and the second dust brush to perform dual dust removal on the entire second surface of the electrode. Moreover, because the first dust brush and the second dust brush are arranged horizontally at intervals, the first dust brush can avoid brushing dust onto the second dust brush, thereby effectively preventing the dust removal effect of the second dust brush from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 Schematic diagram of a first dust removal mechanism provided in an embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the installation position of the first dust removal mechanism of the pole piece and the first roller provided in an embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of a pole piece dust removal device provided in an embodiment of the present utility model.

[0020] The reference numerals in the figures are:

[0021] 100. Pole dust removal device;

[0022] 1. Conveyor mechanism; 11. Conveyor roller assembly; 111. First conveyor roller; 112. Second conveyor roller; 2. First dust removal mechanism; 21. First dust removal box; 211. Second opening; 212. First opening; 213. First bottom wall; 214. Second bottom wall; 22. First dust removal assembly; 221. First dust removal brush; 222. Second dust removal brush; 3. Second dust removal mechanism; 31. Second dust removal box; 32. Second dust removal assembly; 321. Third dust removal brush; 322. Fourth dust removal brush;

[0023] 200, pole piece; 201, first surface; 202, second surface. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0025] The present invention provides a dust removal device 100 for a pole piece. Figures 1 to 3 As shown, the electrode sheet dust removal device 100 includes a conveying mechanism 1 and a first dust removal mechanism 2. The conveying mechanism 1 includes a conveying roller set 11 and a first driving assembly (not shown). The conveying roller set 11 includes a first roller 111, which is used to abut against the first surface 201 of the electrode sheet 200. The first driving assembly is used to drive the conveying roller set 11 to move the electrode sheet 200. The first dust removal mechanism 2 includes a first dust removal box 21, a first dust removal assembly 22 and a second drive assembly. The first dust removal assembly 22 includes a first dust removal brush 221 and a second dust removal brush 222 that are horizontally spaced apart in the first dust removal box 21. The first dust removal brush 221 and the second dust removal brush 222 are both arranged adjacent to the first roller 111 so that the first dust removal brush 221 and the second dust removal brush 222 can both contact the second surface 202 of the pole piece 200; the second drive assembly is connected to the first dust removal brush 221 and the second dust removal brush 222 to drive the first dust removal brush 221 and the second dust removal brush 222 to rotate.

[0026] Specifically, the first driving assembly drives the conveying roller group 11 to rotate, thereby driving the pole piece 200 to move along the conveying roller group 11, and the first roller 111 in the conveying roller group 11 abuts the first surface 201 of the pole piece 200. In addition, the first dust removal brush 221 and the second dust removal brush 222 are arranged horizontally at intervals in the first dust removal box 21. The first dust removal brush 221 and the second dust removal brush 222 are both arranged adjacent to the first roller 111, so that the first dust removal brush 221 and the second dust removal brush 222 can both contact the second surface 202 of the pole piece 200. By driving the first dust removal brush 221 and the second dust removal brush 222 to rotate by the second driving assembly and the first roller 111 to rotate by the first driving assembly, the entire second surface 202 of the pole piece 200 can be gradually moved to the first roller 111, so that the first dust removal brush 221 and the second dust removal brush 222 can perform double dust removal on the entire second surface 202 of the pole piece 200. Furthermore, since the first dust removal brush 221 and the second dust removal brush 222 are arranged at intervals in the horizontal direction, the first dust removal brush 221 can be prevented from brushing dust onto the second dust removal brush 222, thereby effectively preventing the dust removal effect of the second dust removal brush 222 from being affected.

[0027] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3As shown, the second drive assembly includes a first motor (not shown) and a second motor (not shown). The first motor is connected to the first dust removal brush 221, and is used to drive the first dust removal brush 221 to rotate away from the side of the bottom of the first dust removal box 21 toward a position close to the second dust removal brush 222. The second motor is connected to the second dust removal brush 222, and is used to drive the second dust removal brush 222 to rotate away from the side of the bottom of the first dust removal box 21 toward a position close to the first dust removal brush 221.

[0028] It can be understood that the first motor drives the first dust removal brush 221 to rotate away from the side of the bottom of the first dust removal box 21 toward a position close to the second dust removal brush 222, so that the first dust removal brush 221 can brush dust along the moving direction of the pole piece 200, so that the first dust removal brush 221 can brush the dust on the second surface 202 of the pole piece 200 from the side of the first roller 111 into the first dust removal box 21. The second motor drives the second dust removal brush 222 to rotate from the side of the bottom of the first dust removal box 21 to a position close to the first dust removal brush 221, so that the second dust removal brush 222 can brush dust in the opposite direction of the movement of the pole piece 200. On the one hand, it can increase the friction between the second dust removal brush 222 and the second surface 202 of the pole piece 200, thereby enhancing the dust removal effect of the second dust removal brush 222; on the other hand, it enables the second dust removal brush 222 to smoothly brush the dust on the second surface 202 of the pole piece 200 from the side of the first roller 111 into the first dust removal box 21, so as to avoid dust splashing and contaminating the pole piece dust removal device 100.

[0029] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3 As shown, the first dust removal box 21 is provided with a first opening (not shown) on the side away from the bottom of the box, and the first roller 111 is at least partially accommodated in the first dust removal box 21 through the first opening, so that the adjacent position of the first roller 111 and the first dust removal brush 221, as well as the adjacent position of the first roller 111 and the second dust removal brush 222 are both located in the first dust removal box 21.

[0030] Specifically, a first opening is provided on a side of the first dust removal box 21 away from the bottom of the box, and the first roller 111 can be at least partially accommodated in the first dust removal box 21 through the first opening. As a result, the pole piece 200 at the first roller 111 can also be accommodated in the first dust removal box 21, so that the first dust removal brush 221 and the second dust removal brush 222 can remove dust from the pole piece 200 in the first dust removal box 21, thereby preventing dust from splashing out of the first dust removal box 21 and ensuring the cleanliness of the pole piece dust removal device 100.

[0031] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3As shown, the first dust removal box 21 is provided with a second opening 211 and a third opening (not shown) that connect to its internal space. The second opening 211 and the third opening are arranged opposite to each other in the axial direction of the first roller 111, and the first roller 111 passes through the second opening 211 and the third opening.

[0032] Specifically, the first dust removal box 21 is provided with a second opening 211 and a third opening oppositely disposed along the axial direction of the first roller 111. Both ends of the first opening are connected to the second opening 211 and the third opening. This allows the first roller 111 to be directly inserted into the second opening 211 and the third opening, facilitating installation of the first dust removal box 21 on the first roller 111. This ensures that the first roller 111 can be partially accommodated within the first dust removal box 21, thereby ensuring that the pole piece 200 on the first roller 111 is accommodated within the first dust removal box 21.

[0033] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3 As shown, the first dust removal brush 221 and the second dust removal brush 222 are cylindrical roller brushes.

[0034] Specifically, the first dust removal brush 221 and the second dust removal brush 222 are cylindrical roller brushes. Since the first roller 111 is also cylindrical, the first dust removal brush 221 and the second dust removal brush 222 can always be in contact with the second surface 202 of the pole piece 200 during the rotation process, so that the bristles on the first dust removal brush 221 and the second dust removal brush 222 can fully clean the dust on the second surface 202 of the pole piece 200, thereby enhancing the dust removal effect of the first dust removal brush 221 and the second dust removal brush 222.

[0035] It is worth mentioning that the bristles on the first dust removal brush 221 and the second dust removal brush 222 are both soft bristles to prevent the bristles from being too hard and damaging the electrode 200. At the same time, it also makes it easier for the first dust removal brush 221 and the second dust removal brush 222 to fully press against the second surface 202 of the electrode 200 to ensure the dust removal effect.

[0036] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3 As shown, the bottom of the first dust removal box 21 has a tendency to collapse in the direction away from the first opening.

[0037] Specifically, the bottom of the first dust box 21 includes a first bottom wall 213 and a second bottom wall 214 on a side away from the first opening. The first bottom wall 213 and the second bottom wall 214 are arranged at an angle, and the first bottom wall 213 and the second bottom wall 214 tend to move closer in the direction away from the cavity opening. Therefore, when the first dust brush 221 and the second dust brush 222 brush dust on the pole piece 200 into the first dust box 21, the dust can be effectively guided and gathered between the first bottom wall 213 and the second bottom wall 214, thereby improving the efficiency of the first dust box 21 in gathering dust, making it easier to collect dust and facilitating subsequent dust cleaning.

[0038] Furthermore, as a specific implementation in some embodiments of the present invention, the dust removal mechanism also includes a third drive assembly (not shown), which is connected to the first dust removal box 21 and is used to drive the first dust removal box 21 close to or away from the first roller 111.

[0039] Specifically, the third drive assembly is connected to the first dust removal box 21, and the third drive assembly drives the first dust removal box 21 toward or away from the first roller 111. Thus, on the one hand, when installing the pole piece 200, the third drive assembly can be used to drive the first dust removal box 21 away from the first roller 111, so that there is sufficient space between the first dust removal box 21 and the first roller 111 to facilitate installation of the pole piece 200 on the first roller 111. On the other hand, by implementing this embodiment, the tightness of the contact between the first dust removal brush 221 and the second dust removal brush 222 and the second surface 202 of the pole piece 200 can be more conveniently adjusted without having to disassemble or assemble the first dust removal box 21.

[0040] Furthermore, as a specific implementation in some embodiments of the present invention, Figures 1 to 3 As shown, the electrode dust removal device 100 also includes a dust suction mechanism (not shown). The bottom of the first dust removal box 21 is provided with a first opening 212 , and the dust suction mechanism is connected to the first opening 212 for sucking out dust in the first dust removal box 21 .

[0041] Specifically, a first opening 212 is provided between the first bottom wall 213 and the second bottom wall 214, and the dust collection mechanism is connected to the first opening 212. Thus, dust in the first dust box 21 can be gathered at the first opening 212, so that the dust collection mechanism can remove dust in the first dust box 21, thereby improving the dust collection efficiency of the dust collection mechanism.

[0042] Furthermore, as a specific implementation in some embodiments of the present invention, Figure 3As shown, the electrode dust removal device 100 also includes a second dust removal mechanism 3, the second dust removal mechanism 3 includes a second dust removal box 31, a second dust removal assembly 32 and a fourth drive assembly (not shown), the second dust removal assembly 32 includes a third dust removal brush 321 and a fourth dust removal brush 322 arranged in the second dust removal box 31 in the horizontal direction, the conveying roller group 11 also includes a second roller 112, the first roller 111 is used to abut the second surface 202 of the electrode 200, the third dust removal brush 321 and the fourth dust removal brush 322 are both arranged adjacent to the first roller 111, so that the third dust removal brush 321 and the fourth dust removal brush 322 can both contact the first surface 201 of the electrode 200; the fourth drive assembly is connected to the third dust removal brush 321 and the fourth dust removal brush 322 to drive the third dust removal brush 321 and the fourth dust removal brush 322 to rotate.

[0043] Specifically, the first roller 111 abuts against the second surface 202 of the pole piece 200, and the third dust removal brush 321 and the fourth dust removal brush 322 are arranged at intervals in the horizontal direction on the second dust removal box 31. The third dust removal brush 321 and the fourth dust removal brush 322 are both arranged adjacent to the second roller 112, so that the third dust removal brush 321 and the fourth dust removal brush 322 can both contact the first surface 201 of the pole piece 200. The third dust removal brush 321 and the fourth dust removal brush 322 are driven to rotate by the fourth driving component, and the first driving component drives the second roller 112 to rotate, so that the entire first surface 201 of the pole piece 200 can be gradually moved to the second roller 112, so that the third dust removal brush 321 and the fourth dust removal brush 322 can perform double dust removal on the entire first surface 201 of the pole piece 200. Furthermore, since the third dust removal brush 321 and the fourth dust removal brush 322 are arranged at intervals in the horizontal direction, the third dust removal brush 321 can be prevented from brushing dust onto the fourth dust removal brush 322, thereby effectively preventing the dust removal effect of the fourth dust removal brush 322 from being affected.

[0044] In addition, by implementing this embodiment, the first dust removal mechanism 2 and the second dust removal mechanism 3 cooperate to remove dust from both the first surface 201 and the second surface 202 of the pole piece 200, thereby ensuring the cleanliness of the first surface 201 and the second surface 202 of the pole piece 200.

[0045] Furthermore, as a specific implementation in some embodiments of the present invention, Figure 3 As shown, the fourth drive assembly includes a third motor (not shown) and a fourth motor (not shown). The third motor is connected to the third dust removal brush 321 for driving the third dust removal brush 321 to rotate away from the side of the bottom of the second dust removal box 31 toward a position close to the fourth dust removal brush 322. The fourth motor is connected to the fourth dust removal brush 322 for driving the fourth dust removal brush 322 to rotate away from the side of the bottom of the second dust removal box 31 toward a position close to the third dust removal brush 321.

[0046] It can be understood that the third motor drives the third dust removal brush 321 to rotate from the side of the bottom of the second dust removal box 31 to a position close to the fourth dust removal brush 322, so that the third dust removal brush 321 can brush dust along the moving direction of the pole piece 200, so that the third dust removal brush 321 can brush the dust on the first surface 201 of the pole piece 200 from the side of the second roller 112 into the second dust removal box 31. The fourth motor drives the fourth dust removal brush 322 to rotate from the side of the bottom of the second dust removal box 31 to a position close to the third dust removal brush 321, so that the fourth dust removal brush 322 can brush dust against the moving direction of the pole piece 200. On the one hand, it can increase the friction between the fourth dust removal brush 322 and the first surface 201 of the pole piece 200, thereby enhancing the dust removal effect of the fourth dust removal brush 322; on the other hand, it enables the fourth dust removal brush 322 to smoothly brush the dust on the first surface 201 of the pole piece 200 from the side of the second roller 112 into the second dust removal box 31, so as to avoid dust splashing and contaminating the pole piece dust removal device 100.

[0047] It is worth mentioning that the dust collection mechanism is also connected to the bottom of the second dust collection box 31, so that the dust collection mechanism can simultaneously remove dust from the first dust collection box 21 and the second dust collection box 31. It should be noted that the structure of the second dust collection mechanism 3 is the same as that of the first dust collection mechanism 2. The other structures of the second dust collection mechanism 3 can be referred to the first dust collection mechanism 2 described above and will not be repeated here.

[0048] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A pole piece dust removal device, characterized in that: include: A conveying mechanism, comprising a conveying roller group and a first driving assembly, wherein the conveying roller group comprises a first passing roller, the first passing roller being configured to abut against a first surface of the pole piece, and the first driving assembly being configured to drive the conveying roller group to move the pole piece; The first dust removal mechanism includes a first dust removal box, a first dust removal assembly and a second drive assembly, the first dust removal assembly includes a first dust removal brush and a second dust removal brush arranged at intervals in the horizontal direction on the first dust removal box, the first dust removal brush and the second dust removal brush are both arranged adjacent to the first roller so that the first dust removal brush and the second dust removal brush can contact the second surface of the pole piece; the second drive assembly is connected to the first dust removal brush and the second dust removal brush to drive the first dust removal brush and the second dust removal brush to rotate.

2. The electrode dust removal device according to claim 1, characterized in that: The second driving assembly includes a first motor and a second motor. The first motor is connected to the first dust removal brush and is used to drive the first dust removal brush to rotate away from the side of the bottom of the first dust removal box toward a position close to the second dust removal brush. The second motor is connected to the second dust removal brush and is used to drive the second dust removal brush to rotate away from the side of the bottom of the first dust removal box toward a position close to the first dust removal brush.

3. The electrode dust removal device according to claim 2, characterized in that: The first dust removal box is provided with a first opening on a side away from the bottom of the box, and the first roller is at least partially accommodated in the first dust removal box through the first opening, so that the adjacent position of the first roller and the first dust removal brush, as well as the adjacent position of the first roller and the second dust removal brush are both located in the first dust removal box.

4. The electrode dust removal device according to claim 3, characterized in that: The first dust removal box is provided with a second opening and a third opening communicating with the internal space thereof. The second opening and the third opening are arranged opposite to each other in the axial direction of the first roller, and the first roller passes through the second opening and the third opening.

5. The electrode dust removal device according to claim 2, characterized in that: The first dust removal brush and the second dust removal brush are cylindrical roller brushes.

6. The electrode dust removal device according to claim 1, characterized in that: The bottom of the first dust removal box has a tendency to collapse in a direction away from the first roller.

7. The electrode dust removal device according to claim 1, characterized in that: The dust removal mechanism further includes a third driving assembly, which is connected to the first dust removal box and is used to drive the first dust removal box to move closer to or away from the first roller.

8. The electrode dust removal device according to any one of claims 1 to 7, characterized in that: It also includes a dust suction mechanism. The bottom of the first dust removal box is provided with a first opening. The dust suction mechanism is connected to the first opening to suck out dust in the first dust removal box.

9. The electrode dust removal device according to any one of claims 1 to 7, characterized in that: It also includes a second dust removal mechanism, which includes a second dust removal box, a second dust removal assembly and a fourth drive assembly. The second dust removal assembly includes a third dust removal brush and a fourth dust removal brush that are horizontally spaced apart from each other in the second dust removal box. The conveying roller group also includes a second passing roller. The first passing roller is used to abut the second surface of the pole piece. The third dust removal brush and the fourth dust removal brush are both arranged adjacent to the first passing roller so that the third dust removal brush and the fourth dust removal brush can both contact the first surface of the pole piece; the fourth drive assembly is connected to the third dust removal brush and the fourth dust removal brush to drive the third dust removal brush and the fourth dust removal brush to rotate.

10. The electrode dust removal device according to claim 9, characterized in that: The fourth drive assembly includes a third motor and a fourth motor. The third motor is connected to the third dust removal brush and is used to drive the third dust removal brush to rotate away from the side of the bottom of the second dust removal box toward a position close to the fourth dust removal brush. The fourth motor is connected to the fourth dust removal brush and is used to drive the fourth dust removal brush to rotate away from the side of the bottom of the second dust removal box toward a position close to the third dust removal brush.

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