Middle sweeping assembly and cleaning equipment

By directly connecting the drive component and the cleaning component and using a flexible connector design, the problem of high noise in the mid-sweep component was solved, resulting in noise reduction and improved space utilization.

CN223979780UActive Publication Date: 2026-03-10SHEN ZHEN 3IROBOTICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-20
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

The existing mid-scan component is too noisy when working, which leads to a decline in user experience.

Method used

In the mid-sweeping assembly, the drive component and the cleaning component are directly connected, and the axis of the drive end of the drive component is collinear with the rotation axis of the cleaning component. The gearbox transmission is eliminated, and a flexible connector is set between the support and the inner wall of the mounting groove to reduce vibration and noise.

Benefits of technology

It reduces the noise level of the mid-sweep component, improves space utilization, and avoids increased noise caused by the deflection and vibration of the cleaning components.

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Abstract

The utility model discloses a middle sweeping assembly and cleaning equipment, the cleaning equipment comprises the middle sweeping assembly, and the middle sweeping assembly comprises an outer shell, a cleaning part and a driving part. Wherein a mounting groove is formed in the outer shell, the cleaning component is rotatably arranged in the mounting groove, the driving component is directly connected with the cleaning component so as to drive the cleaning component to rotate in the mounting groove, and the rotating axis of the cleaning component and the axis of the driving end of the driving component are collinear. According to the middle sweeping assembly and the cleaning equipment, the problem that in the prior art, noise is large when a middle sweeping assembly works is solved.
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Description

Technical Field

[0001] This application relates to the field of floor cleaning technology, and more specifically, to a sweeping component and cleaning equipment. Background Technology

[0002] Cleaning equipment includes robotic vacuum cleaners, vacuum cleaners, and multi-functional cleaning base stations. Most cleaning equipment is often equipped with a central cleaning component, which is used to clean up external debris and collect it into the cleaning equipment.

[0003] However, existing mid-scan components are too noisy during operation, resulting in a degraded user experience. Utility Model Content

[0004] The main objective of this application is to provide a mid-sweeping component and cleaning equipment to at least solve the problem of excessive noise during operation of the mid-sweeping component in the prior art.

[0005] According to one aspect of this application, a mid-scan component is provided, comprising:

[0006] The outer casing has a mounting groove.

[0007] A cleaning component, which is rotatably disposed within the mounting slot;

[0008] A driving component is directly connected to the cleaning component to drive the cleaning component to rotate within the mounting slot, and the rotation axis of the cleaning component is collinear with the axis of the driving end of the driving component.

[0009] Furthermore, the end of the cleaning component facing away from the driving component is the first end, and a support portion is provided on the inner wall of the mounting groove opposite to the first end. The cleaning component is rotatably sleeved on the support portion, and the centerline of the support portion, the rotation axis of the cleaning component, and the axis of the driving end are all located on the same straight line.

[0010] Furthermore, the support portion includes a support shaft that extends a predetermined length in a direction close to the cleaning component, and a first groove is provided on the first end, with the support shaft passing through the first groove.

[0011] Furthermore, the intermediate scanning assembly also includes a first flexible connector, which is disposed between the support portion and the inner wall surface of the mounting groove.

[0012] Furthermore, the drive unit has a first connecting part on its drive seat and a second connecting part on its outer casing;

[0013] The mid-scan assembly further includes a fixing member and a second flexible connector. The second flexible connector is disposed between the first connecting part and the second connecting part. The fixing member is used to fix the first connecting part, the second flexible connector, and the second connecting part.

[0014] Furthermore, the first connecting part includes a connecting block, and the connecting block has a first connecting hole;

[0015] The second connecting portion includes a connecting protrusion that passes through the first connecting hole, and a second connecting hole is formed in the middle of the connecting protrusion;

[0016] The second flexible connector has a third connecting hole through it, the second flexible connector passes through the first connecting hole, and the connecting protrusion passes through the third connecting hole. The fixing member passes through the third connecting hole and is connected to the second connecting hole.

[0017] Furthermore, the drive end includes a drive shaft and an adapter, the adapter being disposed at one end of the drive shaft near the cleaning component;

[0018] The cleaning component has a second groove on its second end near the driving component that is adapted to the adapter, and the adapter is embedded in the second groove.

[0019] Furthermore, a protective groove is provided on the outer casing, and part of the drive seat of the drive component is located within the protective groove.

[0020] Furthermore, the drive component includes a brushless motor.

[0021] On the other hand, this application provides a cleaning device that includes the aforementioned intermediate sweeping assembly, the cleaning device comprising:

[0022] The main body has a central scanning component located at its bottom and along its height direction, and the central scanning component can reciprocate along the height direction of the main body.

[0023] Compared to existing technologies, the drive component and cleaning component are directly connected in this application, eliminating the need for a gearbox and thus reducing noise levels in the mid-sweep assembly. Furthermore, the rotation axis of the cleaning component is collinear with the axis of the drive end of the drive component, meaning that the cleaning component will not deflect when directly driven by the drive component, preventing increased noise due to vibration. On the other hand, since the mid-sweep assembly of this application does not require a gearbox, it improves space utilization to some extent. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the cleaning equipment disclosed in this application;

[0026] Figure 2 This is a schematic diagram of the scanning component disclosed in this application from a first-view perspective.

[0027] Figure 3 This is a schematic diagram of the mid-scanning component disclosed in this application from a second-view perspective.

[0028] Figure 4 This is a partial structural diagram of the cleaning component disclosed in this application (with the cleaning parts and part of the outer shell removed);

[0029] Figure 5 This is a partial structural diagram of the cleaning component disclosed in this application (with the cleaning parts, part of the outer shell, and the adapter removed);

[0030] Figure 6 This is a partial structural schematic diagram of the scanning component disclosed in this application (with part of the outer shell removed);

[0031] Figure 7 This is a partial structural schematic diagram of the scanning component disclosed in this application (with part of the second flexible connector removed);

[0032] Figure 8 This is a partial structural diagram of the scanning component disclosed in this application (with the drive unit removed);

[0033] Figure 9 This is a schematic diagram of the structure of the second flexible connector disclosed in this application.

[0034] The above figures include the following reference numerals:

[0035] 1. Mid-sweep assembly; 10. Outer shell; 11. Shock-absorbing section; 12. Second connecting part; 13. Protective groove; 20. Cleaning component; 21. First end; 22. Second end; 30. Drive component; 31. Drive end; 32. Drive base; 33. First connecting part; 40. First flexible connector; 50. Second flexible connector; 51. Third connecting hole; 52. Annular groove; 60. Support part; 61. Support shaft; 101. Mounting groove; 121. Connecting protrusion; 122. Second connecting hole; 311. Drive shaft; 312. Adapter; 331. Connecting block; 332. First connecting hole; 333. Clearance opening. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0039] See Figures 1 to 9 As shown, according to an embodiment of this application, a cleaning device is provided, which includes a central sweeping assembly 1, the central sweeping assembly 1 including a housing 10, a cleaning component 20 and a driving component 30.

[0040] The outer casing 10 has a mounting groove 101, the cleaning component 20 is rotatably disposed in the mounting groove 101, the driving component 30 is directly connected to the cleaning component 20 to drive the cleaning component 20 to rotate in the mounting groove 101, and the rotation axis of the cleaning component 20 is collinear with the axis of the driving end 31 of the driving component 30.

[0041] It is worth mentioning that existing mid-cleaning components 1 typically include a housing 10, a cleaning component 20, a gearbox, and a drive component 30. The cleaning component 20 is rotatably mounted on the housing 10, the drive component 30 is typically connected to the cleaning device, and the gearbox is located between the drive component 30 and the cleaning component 20. In existing mid-cleaning components 1, the presence of a gearbox causes it to generate significant noise during operation, thereby reducing the user experience.

[0042] Compared to existing technologies, in this embodiment, the driving component 30 is directly connected to the cleaning component 20, eliminating the need for a gearbox and thus reducing the noise level generated by the intermediate sweeping assembly 1 to some extent. Furthermore, in this embodiment, the rotation axis of the cleaning component 20 is collinear with the axis of the driving end 31 of the driving component 30. This means that when the cleaning component 20 is directly driven by the driving component 30, the cleaning component 20 will not deflect, thereby avoiding increased noise caused by aggravated vibration of the cleaning component 20. On the other hand, since the intermediate sweeping assembly 1 in this embodiment does not require a gearbox, its space utilization is improved to some extent.

[0043] Furthermore, the end of the cleaning component 20 that is away from the driving component 30 is the first end 21. A support portion 60 is provided on the inner wall of the mounting groove 101 opposite to the first end 21. The cleaning component 20 is rotatably sleeved on the support portion 60, and the center line of the support portion 60, the rotation axis of the cleaning component 20 and the axis of the driving end 31 are all located on the same straight line.

[0044] Specifically, the support portion 60 passes through the cleaning component 20, and the support portion 60 provides support for the first end 21 of the cleaning component 20. The cleaning component 20 is rotatably mounted on the support portion 60. Furthermore, in this embodiment, the centerline of the support portion 60, the rotation axis of the cleaning component 20, and the axis of the drive end 31 are all located on the same straight line. That is to say, after the drive component 30 drives the cleaning component 20, the first end 21 of the cleaning component 20 will not be affected by the support portion 60, causing the first end 21 of the cleaning component 20 to deflect, thereby avoiding excessive noise from the first end 21 of the cleaning component 20.

[0045] Furthermore, the support portion 60 includes a support shaft 61, which extends a predetermined length in a direction close to the cleaning component 20. A first groove is provided on the first end 21, and the support shaft 61 passes through the first groove.

[0046] In this embodiment, the cleaning component 20 can be a roller brush or a combination of a roller and a mop. The support shaft 61 passes through the first groove, and the axis of the support shaft 61 is collinear with the rotation axis of the cleaning component 20. Since the first end 21 of the cleaning component 20 is supported by the support shaft 61, the first end 21 of the cleaning component 20 will not shift under the action of gravity. When the cleaning component 20 rotates, the first end 21 of the cleaning component 20 will not deflect, resulting in large vibrations and noise on the cleaning component 20.

[0047] In this embodiment, the cleaning component 20 vibrates during rotation, and this vibration is transmitted to the support shaft 61. If the vibration of the support shaft 61 is too large, it will cause the support shaft 61 to detach from the inner wall of the mounting groove 101 and generate significant noise between the support shaft 61 and the inner wall of the mounting groove 101. To solve the above problem, the mid-sweeping assembly 1 in this embodiment further includes a first flexible connector 40, which is disposed between the support portion 60 and the inner wall of the mounting groove 101.

[0048] In other words, when the support shaft 61 vibrates, the vibration transmitted to the inner wall of the mounting groove 101 is significantly reduced due to the buffering effect of the first flexible connector 40 between the support shaft 61 and the inner wall of the mounting groove 101. This prevents excessive vibration of the inner wall of the mounting groove 101, thus avoiding noise. On the other hand, since the support shaft 61 does not directly contact the inner wall of the mounting groove 101, excessive vibration of the support shaft 61 is prevented from interfering with the inner wall of the mounting groove 101, thus avoiding damage to the inner wall of the mounting groove 101 or the support shaft 61.

[0049] Furthermore, the drive unit 30 has a first connecting part 33 on the drive seat 32 and a second connecting part 12 on the outer shell 10; the intermediate scanning assembly 1 also includes a fixing member and a second flexible connecting member 50, the second flexible connecting member 50 being disposed between the first connecting part 33 and the second connecting part 12, and the fixing member being used to fix the first connecting part 33, the second flexible connecting member 50 and the second connecting part 12.

[0050] In this embodiment, the drive component 30 is connected to the second connection portion 12 on the outer casing 10 via the first connection portion 33 on the drive base 32, thereby fixing the drive component 30 to the outer casing 10. When the drive component 30 is working, the drive component 30 itself will vibrate, which may cause significant noise between the first connection portion 33 and the second connection portion 12. Therefore, in this embodiment, a second flexible connector 50 is provided between the first connection portion 33 and the second connection portion 12. Thanks to the buffering effect of the second flexible connector 50, the vibration transmitted from the first connection portion 33 to the second connection portion 12 is reduced, thereby avoiding significant noise between the first connection portion 33 and the second connection portion 12.

[0051] Furthermore, the first connecting part 33 includes a connecting block 331, on which a first connecting hole 332 is provided; the second connecting part 12 includes a connecting protrusion 121, which passes through the first connecting hole 332, and a second connecting hole 122 is provided in the middle of the connecting protrusion 121; a third connecting hole 51 is provided through the second flexible connector 50, which passes through the first connecting hole 332, and the connecting protrusion 121 passes through the third connecting hole 51; the fixing member passes through the third connecting hole 51 and is connected in the second connecting hole 122.

[0052] Specifically, during assembly, the connecting hole is first aligned with the connecting protrusion 121, and the connecting protrusion 121 passes through the first connecting hole 332. Then, the second flexible connector 50 passes through the first connecting hole 332, and the connecting protrusion 121 passes through the third connecting hole 51. Finally, the fastener passes through the third connecting hole 51, and the fastener is connected to the second connecting hole 122, thereby fixing the connecting block 331, the second flexible connector 50, and the connecting protrusion 121 together.

[0053] Furthermore, in some embodiments, the connecting block 331 has a clearance opening 333 on its outer periphery, which communicates with the first connecting hole 332. When assembling the second flexible connector 50, the clearance opening 333 allows the second flexible connector 50 to pass into the first connecting hole 332. Additionally, the second flexible connector 50 has an annular groove 52 on its outer periphery. When the second flexible connector 50 is located within the first connecting hole 332, the connecting block 331 is engaged within the annular groove 52, thereby improving the connection stability between the second flexible connector 50 and the connecting block 331.

[0054] In some embodiments, the first connecting portion 33 includes a plurality of first connecting portions 33, which are spaced apart along the outer periphery of the drive seat 32. The second connecting portion 12 also includes a plurality of second connecting portions 12, which are spaced apart along the circumferential direction of the outer shell 10. The fixing member and the second flexible connecting member 50 each include a plurality of fixing members. Each first connecting portion 33, each second connecting portion 12, each second flexible connecting member 50 and each fixing member are arranged in a one-to-one correspondence, thereby improving the connection reliability between the drive component 30 and the outer shell 10. The fixing member includes bolts.

[0055] Furthermore, the drive end 31 includes a drive shaft 311 and an adapter 312. The adapter 312 is disposed at one end of the drive shaft 311 near the cleaning component 20. A second groove adapted to the adapter 312 is provided on the second end 22 of the cleaning component 20 near the drive component 30, and the adapter 312 is embedded in the second groove.

[0056] It is understandable that since the drive shaft 311 is cylindrical, if the drive shaft 311 is directly inserted into the second groove, the friction between the drive shaft 311 and the second groove may be too small, causing the drive shaft 311 to be unable to drive the cleaning component 20 to rotate. Therefore, in this embodiment, an adapter 312 is provided at the end of the drive shaft 311 near the cleaning component 20. The adapter 312 is used to increase the contact friction between the adapter 312 and the second groove, so that when the drive shaft 311 rotates, the adapter 312 can drive the cleaning component 20 to rotate. In this embodiment, the adapter is a connector, which is fixedly connected to the drive shaft 311 by bolts.

[0057] Furthermore, a protective groove 13 is provided on the outer casing 10, and part of the drive seat 32 of the drive component 30 is located in the protective groove 13.

[0058] Specifically, after the drive component 30 is installed on the housing 10, part of the drive seat 32 is located in the protective groove 13. The protective groove 13 can improve the waterproof and dustproof capabilities of the drive seat 32, preventing water stains or dust from entering the drive seat 32 when the sweeping component 1 is cleaning the ground, thereby affecting the drive component 30.

[0059] In some embodiments, a first arc-shaped surface is provided on the drive seat 32 disposed in the protective groove 13, and a second arc-shaped surface adapted to the first arc-shaped surface is provided on the side of the protective groove 13 near the drive seat 32. The first arc-shaped surface and the second arc-shaped surface cooperate to avoid interference between the drive seat 32 and the protective groove 13.

[0060] In some embodiments, as shown in the appendix Figure 7 As shown, the outer casing 10 includes a shock-absorbing section 11, on which shock-absorbing holes are provided, and a second connecting part 12 is disposed on the shock-absorbing section 11.

[0061] Specifically, when the second flexible connector 50 transmits the vibration from the drive component 30 to the second connecting portion 12, the vibration damping holes on the damping section 11 reduce the vibration on the outer shell 10, thereby preventing excessive vibration and noise on the outer shell 10. On the other hand, the vibration damping holes can alter the stiffness distribution of the outer shell 10 to some extent, thus preventing resonance between the outer shell 10 and the drive component 30. In this embodiment, the first flexible connector 40 and the second flexible connector 50 can be silicone connectors, thermoplastic polyurethane connectors, or polyvinyl chloride connectors.

[0062] In this embodiment, the drive component 30 includes a brushless motor. Specifically, the existing drive component 30 uses a brushed motor. Brushed motors generate a lot of noise during operation because the brushes and commutator constantly generate mechanical friction. In this embodiment, a brushless motor is used to avoid excessive noise from the motor.

[0063] In addition, the cleaning device in this embodiment includes a main body, and the central sweeping component 1 is disposed at the bottom of the main body and can reciprocate along the height direction of the main body.

[0064] In actual operation, the central sweeping component 1 moves downward a certain distance along the height direction of the main body under the influence of gravity. When the central sweeping component 1 comes into contact with a protrusion on the ground, it is acted upon by the protrusion, causing it to move upward a certain distance along the height direction of the main body. In other words, the central sweeping component 1 in this embodiment can float along the height direction of the main body depending on the working conditions. Simultaneously, since the driving component 30 is directly connected to the cleaning component 20 in this embodiment, and the axis of the driving end 31 of the driving component 30 is collinear with the rotation axis of the cleaning component 20, this means that when the cleaning component 20 floats, the driving component 30 also floats accordingly. This avoids the risk of damage to the driving component 30 caused by the driving component 30 not floating after the cleaning component 20 floats.

[0065] In summary, in the sweeping component 1 and cleaning device of this application, the driving component 30 is directly connected to the cleaning component 20, and the axis of the driving end 31 of the driving component 30 is collinear with the rotation axis of the cleaning component 20, thereby preventing the cleaning component 20 from deflecting during rotation and reducing the noise generated by the cleaning component 20. Furthermore, a support shaft 61 is provided on the inner wall of the mounting groove 101, and the support shaft 61 passes through the first end 21 of the cleaning component 20. The axis of the support shaft 61, the rotation axis of the cleaning component 20, and the axis of the driving end 31 are collinear, preventing the first end 21 of the cleaning component 20 from deflecting during rotation. Additionally, in this application, a first flexible connector 40 is provided between the support shaft 61 and the outer casing 10, and a second flexible connector 50 is provided between the second connecting portion 12 of the outer casing 10 and the first connecting portion 33 of the drive seat 32. The flexible connectors prevent significant vibrations between the support shaft 61 and the outer casing 10, and between the first connecting portion 33 and the second connecting portion 12.

[0066] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0067] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A center sweep assembly, comprising: The utility model relates to a middle cleaning assembly, including: An outer shell (10) is provided with a mounting groove (101) on the outer shell (10); A cleaning component (20) is rotatably arranged in the mounting groove (101); A driving component (30) is directly connected with the cleaning component (20) to drive the cleaning component (20) to rotate in the mounting groove (101), and the rotation axis of the cleaning component (20) is collinear with the axis of the driving end (31) of the driving component (30).

2. The center sweep assembly of claim 1, wherein, The end of the cleaning component (20) away from the driving component (30) is a first end (21), a support part (60) is arranged on the inner wall of the mounting groove (101) opposite the first end (21), the cleaning component (20) is rotatably sleeved on the support part (60), and the center line of the support part (60), the rotation axis of the cleaning component (20) and the axis of the driving end (31) are all located on the same straight line.

3. The center sweep assembly of claim 2, wherein, The support part (60) includes a support shaft (61) extending a predetermined length in the direction close to the cleaning component (20), a first groove is formed in the first end (21), and the support shaft (61) is arranged in the first groove.

4. The center sweep assembly of claim 2, wherein, The middle cleaning assembly further includes a first flexible connecting piece (40) arranged between the support part (60) and the inner wall of the mounting groove (101).

5. The center scan assembly of claim 1, wherein, A first connecting part (33) is arranged on the driving seat (32) of the driving component (30), and a second connecting part (12) is arranged on the outer shell (10); The middle cleaning assembly further includes a fixing piece and a second flexible connecting piece (50), the second flexible connecting piece (50) is arranged between the first connecting part (33) and the second connecting part (12), and the fixing piece is used for fixing the first connecting part (33), the second flexible connecting piece (50) and the second connecting part (12).

6. The center sweep assembly of claim 5, wherein, The first connecting part (33) includes a connecting block (331), and a first connecting hole (332) is formed in the connecting block (331); The second connecting part (12) includes a connecting protrusion (121), the connecting protrusion (121) passes through the first connecting hole (332), and a second connecting hole (122) is formed in the middle part of the connecting protrusion (121); A third connecting hole (51) is formed in the second flexible connecting piece (50), the second flexible connecting piece (50) passes through the first connecting hole (332), the connecting protrusion (121) is arranged in the third connecting hole (51), and the fixing piece passes through the third connecting hole (51) and is connected in the second connecting hole (122).

7. The middle scan assembly of any of claims 1-6, wherein, The driving end (31) includes a driving shaft (311) and an adapter (312), and the adapter (312) is arranged at one end of the driving shaft (311) close to the cleaning component (20); The cleaning component (20) is provided with a second groove adapted to the adapter (312) on the second end (22) of the driving component (30), and the adapter (312) is embedded in the second groove.

8. The middle scan assembly of any of claims 1-6, wherein, The outer shell (10) is provided with a protection groove (13), and part of the driving seat (32) of the driving component (30) is located in the protection groove (13).

9. The middle scan assembly of any of claims 1-6, wherein, The driving component (30) comprises a brushless motor.

10. A cleaning apparatus, characterized by The cleaning device comprises the middle-sweeping assembly of any one of claims 1 to 9, and the cleaning device comprises: A main body, the middle-sweeping assembly is arranged at the bottom of the main body, and the middle-sweeping assembly can reciprocate along the height direction of the main body.