Disc brush outward-expanding device and cleaning apparatus
By designing an external expansion device for the disc brush and using a pushing mechanism and elastic elements to control the rotation of the disc brush mechanism, the problem of cleaning robots being unable to clean edges was solved, achieving efficient edge cleaning and adaptive obstacle cleaning effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN PUDU TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-05
AI Technical Summary
The cleaning robot cannot clean the edges of the area to be cleaned, which reduces cleaning efficiency.
A disc brush extension device was designed, including a fixed body, a lifting mechanism, a disc brush mechanism, a pushing mechanism, and an elastic element. The rotation of the disc brush mechanism is controlled by the extension and retraction of the pushing mechanism, so as to realize the retraction and extension of the disc brush mechanism, adapt to the shape changes of obstacles, and ensure edge cleaning.
This improves the cleaning efficiency of the cleaning robot, enabling it to effectively clean the edges of the area to be cleaned and maintain the cleaning effect even when obstacles are present, thus enhancing the reliability of the cleaning equipment.
Smart Images
Figure CN224320658U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a disc brush expansion device and cleaning equipment. Background Technology
[0002] Cleaning robots typically use a disc brush module to clean floors. Since the disc brush module is hidden at the bottom of the cleaning robot, it is generally no wider than the robot's body. When the cleaning robot is cleaning along the edges, there will be a certain distance between it and the edge of the area to be cleaned. This results in the cleaning robot being unable to clean the edge of the area to be cleaned, reducing the cleaning efficiency of the cleaning robot. Utility Model Content
[0003] Therefore, it is necessary to provide a disc brush expansion device and cleaning equipment to address the problem that existing cleaning robots cannot clean the edges of the area to be cleaned, thus reducing the cleaning efficiency of the cleaning robot.
[0004] The technical solution is as follows:
[0005] On one hand, a disc brush expansion device is provided for use in cleaning equipment, the cleaning equipment including a chassis, and the disc brush expansion device including:
[0006] The fixed body is fixed to the bottom of the chassis;
[0007] The lifting mechanism is rotatably mounted on the fixed body;
[0008] A brush mechanism is installed on the lifting mechanism;
[0009] A pushing mechanism is located on one side of the lifting mechanism and is controlled to extend or retract;
[0010] The elastic element is connected to both the chassis and the lifting mechanism.
[0011] When the pushing mechanism extends, it pushes the lifting mechanism to rotate, and the elastic element undergoes elastic deformation; when the pushing mechanism shortens, the elastic element drives the lifting mechanism to rotate and reset.
[0012] The technical solution will be further explained below:
[0013] In one embodiment, the lifting mechanism includes a rotating bracket rotatably connected to the fixed body, and the disc brush expansion device further includes an idler wheel, which is mounted on the rotating bracket and used for transmission cooperation with the pushing mechanism.
[0014] In one embodiment, the fixed body is provided with a guide portion that extends around the rotation axis of the rotating bracket and engages with the idler wheel guide.
[0015] In one embodiment, the guide portion is configured as a guide groove, and the disc brush expansion device further includes a guide member, one end of which is connected to the rotating bracket, and the other end extends into the guide groove and guides and cooperates with the inner wall of the guide groove. The idler wheel is rotatably sleeved on the guide member.
[0016] In one embodiment, when the idler wheel drives the guide member to one end of the guide groove, the disc brush mechanism is located at the bottom of the disc brush; when the idler wheel drives the guide member to the other end of the guide groove, the disc brush mechanism extends from the edge of the chassis.
[0017] In one embodiment, the lifting mechanism further includes a lifting bracket, a connecting rod assembly, and a drive member with a telescopic end. The connecting rod assembly is rotatably connected to both the rotating bracket and the lifting bracket. The drive member is rotatably mounted on one of the rotating bracket and the lifting bracket. The telescopic end is rotatably connected to the other of the rotating bracket and the lifting bracket. The brush mechanism is mounted on the lifting bracket.
[0018] In one embodiment, the brush expansion device further includes a mounting bracket, which is mounted on the edge of the chassis, and the elastic element is a tension spring, with its two ends respectively connected to the mounting bracket and the lifting mechanism.
[0019] In one embodiment, the pushing mechanism includes a fixed bracket, a push rod, and a telescopic motor. The fixed bracket is fixed to the chassis, one end of the push rod is rotatably connected to the fixed bracket, and the telescopic motor is rotatably connected to both the fixed bracket and the push rod, so that the push rod can drive the lifting mechanism to rotate.
[0020] In one embodiment, the disc brush expansion device further includes at least one collision wheel, each of the collision wheels being disposed circumferentially along the edge of the disc brush mechanism and all being used to contact obstacles.
[0021] And / or, the disc brush expansion device further includes a lifting and buffering mechanism and a water-blocking component. The lifting and buffering mechanism is installed on the disc brush mechanism, and the water-blocking component is located on the outside of the disc brush mechanism and connected to the lifting and buffering mechanism. The water-blocking component is used to scrape the water thrown out by the disc brush mechanism back to the bottom of the disc brush mechanism.
[0022] On the other hand, a cleaning device is provided, including the aforementioned disc brush expansion device.
[0023] In the above embodiments, the disc brush expansion device and cleaning equipment, when the pushing mechanism extends, pushes the lifting mechanism to rotate relative to the chassis. The lifting mechanism correspondingly drives the disc brush mechanism to rotate, causing the disc brush mechanism to retract to the bottom of the chassis, enabling normal cleaning of the area to be cleaned. At this time, the elastic element undergoes elastic deformation under the action of the lifting mechanism. When the pushing mechanism shortens, the lifting mechanism rotates and resets under the action of the elastic element, causing the lifting mechanism to drive the disc brush mechanism to rotate outward and open. The disc brush mechanism extends from the edge of the chassis, enabling cleaning of the edge of the area to be cleaned (e.g., the wall edge). Simultaneously, because the disc brush mechanism opens through the elastic element, when an obstacle at the edge of the area to be cleaned changes shape, the disc brush mechanism can be pushed back and opened in real time by the obstacle according to its shape change, allowing the disc brush mechanism to adhere to the obstacle, achieving adaptive obstacle-adaptive edge cleaning. Furthermore, the lifting mechanism can independently control the lifting and lowering of the disc brush mechanism, allowing the disc brush mechanism to apply different ground pressures in the open and retracted states, ensuring the cleaning effect of the disc brush mechanism and improving the reliability of the cleaning equipment. Attached Figure Description
[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the structure of a cleaning device according to one embodiment.
[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the brush expansion device in the retracted state.
[0028] Figure 3 for Figure 1 A schematic diagram of the structure of the disk brush expansion device in the open state.
[0029] Figure 4 for Figure 1 A schematic diagram of the disk brush expansion device from another perspective.
[0030] Figure 5 for Figure 4 A schematic diagram of the propulsion mechanism, idler wheel, and guide components.
[0031] Figure 6 for Figure 4 A partial structural diagram of the disk brush expansion device.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Cleaning equipment; 10. Disc brush expansion device; 110. Fixed body; 111. Guide groove; 200. Lifting mechanism; 210. Rotating bracket; 220. Lifting bracket; 230. Linkage assembly; 240. Drive component; 300. Disc brush mechanism; 400. Pushing mechanism; 410. Fixed bracket; 420. Push rod; 430. Telescopic motor; 510. Elastic component; 610. Idler wheel; 620. Guide component; 630. Rotating shaft; 710. Mounting bracket; 810. Collision wheel; 820. Lifting and buffering mechanism; 830. Water blocking component; 20. Chassis; 30. Disc brush lifting device; 40. Obstacle. Detailed Implementation
[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0035] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, a disc brush expansion device 10 is provided, applied to a cleaning device 1. The cleaning device 1 includes a chassis 20. The disc brush expansion device 10 includes a fixed body 110, a lifting mechanism 200, a disc brush mechanism 300, a pushing mechanism 400, and an elastic element 510. The fixed body 110 is fixed to the bottom of the chassis 20. The lifting mechanism 200 is rotatably mounted on the fixed body 110. The disc brush mechanism 300 is mounted on the lifting mechanism 200. The pushing mechanism 400 is located on one side of the lifting mechanism 200 and is controlled to extend or retract. The elastic element 510 is connected to both the chassis 20 and the lifting mechanism 200. When the pushing mechanism 400 extends, it pushes the lifting mechanism 200 to rotate, causing the elastic element 510 to elastically deform. When the pushing mechanism 400 retracts, the elastic element 510 drives the lifting mechanism 200 to rotate and reset.
[0036] In the above embodiment, when the pushing mechanism 400 extends, it pushes the lifting mechanism 200 to rotate relative to the chassis 20. The lifting mechanism 200 then drives the disc brush mechanism 300 to rotate, causing the disc brush mechanism 300 to retract to the bottom of the chassis 20, enabling normal cleaning of the area to be cleaned. At this time, the elastic element 510 undergoes elastic deformation under the action of the lifting mechanism 200. When the pushing mechanism 400 retracts, the lifting mechanism 200 rotates and resets under the action of the elastic element 510, causing the lifting mechanism 200 to drive the disc brush mechanism 300 to rotate outwards and open. The disc brush mechanism 300 extends from the edge of the chassis 20, enabling cleaning of the edges of the area to be cleaned (e.g., the edge of a wall). Meanwhile, since the disc brush mechanism 300 opens via the elastic element 510, when the obstacle 40 at the edge of the area to be cleaned changes shape, the disc brush mechanism 300 can be pushed back and opened in real time by the obstacle 40 according to the shape change of the obstacle 40, so that the disc brush mechanism 300 is close to the obstacle 40, realizing the cleaning device 1's adaptive edge cleaning of the obstacle 40. In addition, the lifting mechanism 200 can independently control the lifting of the disc brush mechanism 300, so that the disc brush mechanism 300 uses different ground pressures in the open and retracted states, ensuring the cleaning effect of the disc brush mechanism 300 and improving the reliability of the cleaning device 1.
[0037] The fixing body 110 can be configured as a fixing frame, fixing plate, or other fixing structure. The fixing body 110 can be installed on the bottom of the chassis 20 via screws, snap-fit connections, or other detachable connection methods. The disc brush mechanism 300 can be configured as any disc brush structure in the prior art capable of cleaning surfaces. The elastic element 510 can be configured as a spring, elastic strip, or other elastic structure. The number of elastic elements 510 can be flexibly adjusted according to actual usage needs.
[0038] like Figure 4 As shown, the lifting mechanism 200 further includes a rotating bracket 210 rotatably connected to the fixed body 110. The disc brush expansion device 10 also includes an idler wheel 610. The idler wheel 610 is mounted on the rotating bracket 210 and is used for transmission cooperation with the push mechanism 400. In this way, the idler wheel 610 and the push mechanism 400 roll into each other, so as to reduce the friction between the push mechanism 400 and the lifting mechanism 200, ensure that the push mechanism 400 smoothly pushes the lifting mechanism 200 to rotate, and improve the reliability of the disc brush expansion device 10.
[0039] Specifically, in this embodiment, the disc brush expansion device 10 further includes a rotating shaft 630. The rotating shaft 630 is mounted on the fixed body 110 and is rotatably connected to the rotating bracket 210. In this way, the lifting mechanism 200 and the disc brush mechanism 300 rotate as a whole around the rotating shaft 630, ensuring the reliability of the operation of the disc brush expansion device 10.
[0040] like Figure 4 As shown, optionally, the fixed body 110 is provided with a guide portion. The guide portion extends around the rotation axis of the rotating bracket 210 and engages with the idler wheel 610 for guidance. In this way, the guide portion can guide the idler wheel 610, ensuring that the idler wheel 610 drives the rotating bracket 210 to oscillate back and forth along a fixed path, thereby improving the reliability of the disc brush expansion device 10.
[0041] The guide section can be configured as a guide waist-shaped hole, a guide rail, or other guide structure.
[0042] like Figure 4 As shown, optionally, the guide portion is configured as a guide groove 111. The disc brush expansion device 10 also includes a guide member 620. One end of the guide member 620 is connected to the rotating bracket 210, and the other end extends into the guide groove 111 and guides and engages with the inner wall of the guide groove 111. The idler wheel 610 is rotatably sleeved on the guide member 620. In this way, the idler wheel 610 is mounted on the rotating bracket 210 through the guide member 620, and at the same time, it is guided and engaged with the guide groove 111 through the guide member 620, improving the ease of assembly of the disc brush expansion device 10.
[0043] The guide member 620 can be configured as a guide pin, guide post, or other guiding structure. In this embodiment, the guide member 620 is configured as a guide pin. The head of the guide pin is located at the guide groove 111 and engages with the inner wall of the guide groove 111.
[0044] like Figure 4 As shown, specifically in this embodiment, when the idler wheel 610 drives the guide member 620 to one end of the guide groove 111, the disc brush mechanism 300 is located at the bottom of the disc brush. When the idler wheel 610 drives the guide member 620 to the other end of the guide groove 111, the disc brush mechanism 300 extends from the edge of the chassis 20. In this way, the two ends of the guide groove 111 can limit the travel of the guide member 620 and the idler wheel 610, thereby limiting the maximum outward opening position and the maximum inward retraction position of the disc brush mechanism 300 through the lifting mechanism 200. That is, when the guide member 620 moves to one end of the guide groove 111, the disc brush mechanism 300 is in the open state, and when the guide member 620 moves to the other end of the guide groove 111, the disc brush mechanism 300 is in the retracted state, improving the practicality of the disc brush expansion device 10.
[0045] The lifting mechanism 200 can be configured as any structure in the prior art capable of driving the brush mechanism 300 to lift.
[0046] like Figure 5As shown, in one embodiment, the lifting mechanism 200 further includes a lifting bracket 220, a connecting rod assembly 230, and a drive member 240 with a telescopic end. The connecting rod assembly 230 is rotatably connected to both the rotating bracket 210 and the lifting bracket 220. The drive member 240 is rotatably mounted on one of the rotating bracket 210 and the lifting bracket 220, and its telescopic end is rotatably connected to the other of the rotating bracket 210 and the lifting bracket 220. The disc brush mechanism 300 is mounted on the lifting bracket 220. Thus, the lifting bracket 220 and the disc brush mechanism 300 on it can be controlled to descend and ascend by extending and shortening the drive member 240, thereby improving the practicality of the disc brush expansion device 10.
[0047] Specifically, in this embodiment, the linkage assembly 230 includes four linkages. The four linkages are arranged parallel to each other and are located on opposite sides of the drive member 240. One end of each of the four linkages is rotatably connected to the rotating bracket 210, and the other end of each of the four linkages is rotatably connected to the lifting bracket 220, so that the rotating bracket 210, the lifting bracket 220, and the four linkages cooperate to form a parallel four-bar linkage mechanism.
[0048] like Figure 4 As shown, in one embodiment, the brush expansion device 10 further includes a mounting bracket 710. The mounting bracket 710 is mounted on the edge of the chassis 20. The elastic element 510 is a tension spring. The two ends of the tension spring are respectively connected to the mounting bracket 710 and the lifting mechanism 200. In this way, the tension spring is fixedly mounted on the chassis 20 by the mounting bracket 710, improving the reliability of the brush expansion device 10.
[0049] Specifically, in this embodiment, the mounting bracket 710 can be installed on the bottom of the chassis 20 by screwing, snap-fitting, or other detachable connection methods. The end of the tension spring away from the mounting bracket 710 is connected to the rotating bracket 210.
[0050] The pushing mechanism 400 can be configured as any structure in the prior art that can push the lifting mechanism 200 to rotate by means of extension and retraction.
[0051] like Figure 6As shown, in one embodiment, the pushing mechanism 400 includes a fixed bracket 410, a push rod 420, and a telescopic motor 430. The fixed bracket 410 is fixed to the chassis 20. One end of the push rod 420 is rotatably connected to the fixed bracket 410. The telescopic motor 430 is rotatably connected to both the fixed bracket 410 and the push rod 420, so that the push rod 420 can push the lifting mechanism 200 to rotate. Thus, when the telescopic motor 430 extends, it drives the push rod 420 to rotate toward the side closer to the lifting mechanism 200, causing the push rod 420, the lifting mechanism 200, and the disc brush mechanism 300 on the side closer to the lifting mechanism 200 to rotate and retract as a whole. When the telescopic motor 430 retracts, the pushing force of the push rod 420 on the lifting mechanism 200 disappears, the elastic element 510 resets, and drives the lifting mechanism 200 and the disc brush mechanism 300 to rotate and open as a whole, improving the practicality of the disc brush expansion device 10.
[0052] Specifically, in this embodiment, the push rod 420 is used to push the idler wheel 610 to move so that the idler wheel 610 drives the lifting mechanism 200 and the brush mechanism 300 to rotate inward and retract as a whole.
[0053] like Figure 5 As shown, in one embodiment, the disc brush expansion device 10 further includes at least one collision wheel 810. Each collision wheel 810 is disposed circumferentially along the edge of the disc brush mechanism 300 and is designed to contact the obstacle 40. Thus, when the disc brush mechanism 300 opens outwards, the collision wheel 810 contacts the obstacle 40, preventing direct collision between the disc brush mechanism 300 and the obstacle 40 and thus avoiding damage, thereby improving the reliability of the disc brush expansion device 10.
[0054] The number and position of the collision wheels 810 can be flexibly adjusted according to actual usage needs.
[0055] like Figure 5 As shown, optionally, the disc brush expansion device 10 also includes a lifting and buffering mechanism 820 and a water-retaining component 830. The lifting and buffering mechanism 820 is mounted on the disc brush mechanism 300. The water-retaining component 830 is located on the outside of the disc brush mechanism 300 and is connected to the lifting and buffering mechanism 820. The water-retaining component 830 is used to scrape the water splashed out by the disc brush mechanism 300 back to the bottom of the disc brush mechanism 300. In this way, the lifting and buffering mechanism 820 can adjust the height of the water-retaining component 830, ensuring that the water-retaining component 830 adaptively contacts the ground for scraping water, thereby improving the practicality and cleaning effect of the disc brush expansion device 10.
[0056] The lifting and buffering mechanism 820 can be any existing structure capable of adjusting the height of the water-blocking component 830 to allow it to adaptively contact the ground. The water-blocking component 830 can be a water-blocking plate, a water-blocking rubber sheet, or other water-blocking structure. The number of lifting and buffering mechanisms 820 and the number of water-blocking components 830 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, the water-blocking component 830 is divided into two or more sections, ensuring that the water splashed out by the disc brush mechanism 300 can be scraped back to the bottom of the disc brush mechanism 300 in both the open and retracted states.
[0057] like Figure 1 As shown, in one embodiment, a cleaning device 1 is provided, including the disc brush expansion device 10 of any of the above embodiments.
[0058] The cleaning equipment 1 can be a cleaning robot or a floor scrubber. The number of disc brush extension devices 10 can be flexibly adjusted according to actual needs. For example, the number of disc brush extension devices 10 can be one or two.
[0059] like Figure 1 As shown, in this specific embodiment, the cleaning equipment 1 further includes a disc brush lifting device 30. The disc brush lifting device 30 includes a fixed body 110, a lifting mechanism 200 mounted on the fixed body 110, and a disc brush mechanism 300 mounted on the lifting mechanism 200. The disc brush lifting device 30 and the disc brush expansion device 10 are respectively mounted on the left and right sides of the bottom of the chassis 20, and both can be controlled to operate independently.
[0060] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0061] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0063] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0064] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0065] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.
[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0067] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A disc brush expansion device, applied to cleaning equipment, the cleaning equipment comprising a chassis, characterized in that, The disc brush expansion device includes: The fixed body is fixed to the bottom of the chassis; The lifting mechanism is rotatably mounted on the fixed body; A brush mechanism is installed on the lifting mechanism; A pushing mechanism is located on one side of the lifting mechanism and is controlled to extend or retract; The elastic element is connected to both the chassis and the lifting mechanism. When the pushing mechanism extends, it pushes the lifting mechanism to rotate, and the elastic element undergoes elastic deformation; when the pushing mechanism shortens, the elastic element drives the lifting mechanism to rotate and reset.
2. The disc brush expansion device according to claim 1, characterized in that, The lifting mechanism includes a rotating bracket rotatably connected to the fixed body, and the disc brush expansion device further includes an idler wheel, which is mounted on the rotating bracket and used for transmission cooperation with the pushing mechanism.
3. The disc brush expansion device according to claim 2, characterized in that, The fixed body is provided with a guide portion, which extends around the rotation axis of the rotating bracket and cooperates with the idler wheel guide.
4. The disc brush expansion device according to claim 3, characterized in that, The guide part is configured as a guide groove, and the disc brush expansion device also includes a guide member. One end of the guide member is connected to the rotating bracket, and the other end extends into the guide groove and guides and cooperates with the inner wall of the guide groove. The idler wheel is rotatably sleeved on the guide member.
5. The disc brush expansion device according to claim 4, characterized in that, When the idler wheel drives the guide member to move to one end of the guide groove, the disc brush mechanism is located at the bottom of the disc brush; when the idler wheel drives the guide member to move to the other end of the guide groove, the disc brush mechanism extends from the edge of the chassis.
6. The disc brush expansion device according to claim 2, characterized in that, The lifting mechanism further includes a lifting bracket, a connecting rod assembly, and a drive component with a telescopic end. The connecting rod assembly is rotatably connected to both the rotating bracket and the lifting bracket. The drive component is rotatably mounted on one of the rotating bracket and the lifting bracket. The telescopic end is rotatably connected to the other of the rotating bracket and the lifting bracket. The disc brush mechanism is mounted on the lifting bracket.
7. The disc brush expansion device according to any one of claims 1 to 6, characterized in that, The disc brush expansion device also includes a mounting bracket, which is installed on the edge of the chassis. The elastic element is a tension spring, and the two ends of the tension spring are respectively connected to the mounting bracket and the lifting mechanism.
8. The disc brush expansion device according to any one of claims 1 to 6, characterized in that, The pushing mechanism includes a fixed bracket, a push rod, and a telescopic motor. The fixed bracket is fixed to the chassis. One end of the push rod is rotatably connected to the fixed bracket. The telescopic motor is rotatably connected to both the fixed bracket and the push rod, so that the push rod can drive the lifting mechanism to rotate.
9. The disc brush expansion device according to any one of claims 1 to 6, characterized in that, The disc brush expansion device also includes at least one collision wheel, each of which is arranged circumferentially along the edge of the disc brush mechanism and is used to contact obstacles. And / or, the disc brush expansion device further includes a lifting and buffering mechanism and a water-blocking component. The lifting and buffering mechanism is installed on the disc brush mechanism, and the water-blocking component is located on the outside of the disc brush mechanism and connected to the lifting and buffering mechanism. The water-blocking component is used to scrape the water thrown out by the disc brush mechanism back to the bottom of the disc brush mechanism.
10. A cleaning device, characterized in that, Includes the disc brush expansion device as described in any one of claims 1 to 9.