Speed reduction cleaning device, cleaning module and cleaning equipment

Abstract

The present disclosure provides a deceleration cleaning device, a cleaning module and a cleaning equipment. The deceleration cleaning device comprises a cleaning mechanism and a small-tooth-difference planetary reducer. The small-tooth-difference planetary reducer is configured to be installed on the shell of a motor. The power input end of the small-tooth-difference planetary reducer is configured to be connected with the output shaft of the motor. The power output end of the small-tooth-difference planetary reducer is connected with the cleaning mechanism. The small-tooth-difference planetary reducer is configured to be connected with the output shaft of the motor. The cleaning mechanism is connected with the power output end of the small-tooth-difference planetary reducer. When the cleaning mechanism works, it is connected with the motor through the small-tooth-difference planetary reducer. Thus, the cleaning mechanism obtains the power after deceleration. The rotating speed of the cleaning mechanism is reduced, and the torque of the cleaning mechanism is improved. Because the torque of the cleaning mechanism is increased, the maximum frictional resistance that can be overcome by the cleaning mechanism is increased, and the maximum working pressure of the cleaning mechanism is increased. Thus, the cleaning effect of the cleaning mechanism is improved.

Description

Technical Field

[0001] This disclosure relates to the technical field of cleaning equipment, and in particular to a deceleration cleaning device, a cleaning module, and a cleaning equipment. Background Technology

[0002] Cleaning equipment such as robotic vacuum cleaners typically include cleaning mechanisms such as a mop tray. The rotating cleaning mechanism rubs against the floor to achieve the effect of cleaning the floor.

[0003] In related technologies, for example, the mopping assembly and cleaning device disclosed in CN119214538A, a motor is connected to the cleaning mechanism to drive the cleaning mechanism to rotate.

[0004] However, because the cleaning mechanism is directly connected to the motor, its output torque is relatively low. This low torque limits the ground pressure the cleaning mechanism can apply; otherwise, the torque would be insufficient to overcome the frictional resistance of the ground, causing the motor to stall and the cleaning mechanism to malfunction. Furthermore, the low ground pressure results in low friction between the cleaning mechanism and the ground, which is detrimental to improving its cleaning effectiveness.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] The purpose of this disclosure is to overcome at least one of the above-mentioned technical defects and to provide a deceleration cleaning device, a cleaning module, and a cleaning equipment, wherein the cleaning mechanism is connected to a planetary reducer with a small tooth difference, so that the cleaning mechanism outputs a larger torque, thereby increasing the ground pressure of the cleaning mechanism and thus improving the cleaning effect of the cleaning mechanism.

[0007] The purpose of this disclosure is achieved through the following technical solution: In a first aspect, this disclosure provides a deceleration cleaning device, including a cleaning mechanism, the deceleration cleaning device further including: A planetary reducer with a small tooth difference is configured to be mounted on the housing of a motor. The power input end of the planetary reducer is configured to be connected to the output shaft of the motor, and the power output end of the planetary reducer is connected to the cleaning mechanism.

[0008] In some implementations, the low-tooth-difference planetary reducer includes a fixed internal gear ring, an output internal gear ring and a planet carrier arranged coaxially, and planetary gears rotatably connected to the planet carrier; The fixed internal gear ring is configured to be fixed relative to the motor housing, the output internal gear ring rotates relative to the fixed internal gear ring, and the planetary carrier is configured to rotate with the output shaft of the motor; the planetary gears mesh with the fixed internal gear ring and the output internal gear ring respectively.

[0009] In some implementations, the low-tooth-difference planetary reducer further includes a mounting housing configured to be mounted on the motor housing, the fixed internal gear ring being fixedly connected to the mounting housing, and the output internal gear ring being rotatably connected to the mounting housing.

[0010] In some implementations, the low-tooth-difference planetary reducer further includes a bearing, through which the output internal gear ring is mounted within the mounting housing.

[0011] In some implementations, the number of teeth on the fixed internal gear ring is greater than or less than the number of teeth on the output internal gear ring.

[0012] In some implementations, the planetary gear includes a first planetary gear and a second planetary gear, which are coaxially arranged and rotatably connected to the planet carrier; The first planetary gear meshes with the fixed internal gear ring, and the second planetary gear meshes with the output internal gear ring; the number of teeth on the first planetary gear is greater than or less than the number of teeth on the second planetary gear, and the fixed internal gear ring and the output internal gear ring have the same number of teeth.

[0013] In some implementations, the low-tooth-difference planetary reducer further includes a sun gear configured to connect to the output shaft of the motor, and the sun gear also meshes with the planetary gears.

[0014] In some implementations, the cleaning mechanism includes a cloth tray.

[0015] Secondly, this disclosure also provides a cleaning module, including a motor and a speed-reducing cleaning device according to any of the above implementations, wherein the low-tooth-difference planetary reducer is mounted on the housing of the motor, and the power input end of the low-tooth-difference planetary reducer is connected to the output shaft of the motor.

[0016] Thirdly, this disclosure also provides a cleaning device, including a body and the aforementioned cleaning module, wherein the motor is mounted on the bottom of the body.

[0017] Compared with the prior art, this application has at least the following advantages: The low-tooth-difference planetary reducer is configured to connect to the motor's output shaft. The cleaning mechanism is connected to the power output end of the low-tooth-difference planetary reducer, allowing the cleaning mechanism to receive reduced power during operation. This reduces the cleaning mechanism's speed and increases its torque. The increased torque increases the maximum frictional resistance the cleaning mechanism can overcome, thereby increasing its maximum working pressure and ultimately improving its cleaning effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the cleaning module according to an embodiment of the present disclosure; Figure 2 for Figure 1 A cross-sectional view along line AA in the cleaning module shown; Figure 3 for Figure 1 An exploded view of the cleaning module shown; Figure 4 for Figure 1 A partial cross-sectional view of the cleaning module shown.

[0020] Reference numerals: 10, cleaning module; 10a, motor; 10b, deceleration cleaning device; 100. Cleaning mechanism; 110. Lifting assembly; 200. Small tooth difference planetary reducer; 210. Fixed internal gear ring; 220. Output internal gear ring; 221. Internal gear ring body; 222. Output section; 230. Planet carrier; 231. Carrier body; 232. Connecting shaft; 240. Planetary gear; 241. First planetary gear; 242. Second planetary gear; 250. Mounting housing; 260. Bearing; 270. Sun gear; 280. Drive shaft. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide the reader with a more thorough and comprehensive understanding.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments: In related technologies, the cleaning mechanism is directly connected to the motor, resulting in a relatively low output torque. Because of this low torque, the ground pressure of the cleaning mechanism cannot be set too high; otherwise, the torque will be insufficient to overcome the frictional resistance of the ground, causing the motor to stall and the cleaning mechanism to fail to clean properly. Furthermore, the low ground pressure results in low friction between the cleaning mechanism and the ground, which is detrimental to improving the cleaning effect.

[0025] To overcome at least one of the above technical defects, such as Figure 1 and Figure 2 As shown, the present invention provides a deceleration cleaning device 10b, including a low-tooth-difference planetary reducer 200 and a cleaning mechanism 100. The low-tooth-difference planetary reducer 200 is configured to be mounted on the housing of a motor 10a, the power input end of the low-tooth-difference planetary reducer 200 is configured to be connected to the output shaft of the motor 10a, the low-tooth-difference planetary reducer 200 is configured to reduce the speed of the output shaft of the motor 10a, and the power output end of the low-tooth-difference planetary reducer 200 is connected to the cleaning mechanism 100.

[0026] It is understood that the cleaning mechanism 100 cleans the work surface by rotating around its central axis. The cleaning device can be a rag mechanism, a side brush mechanism, or other existing cleaning mechanisms. The work surface can be a floor, tabletop, wall, glass surface, or other surfaces that need to be cleaned.

[0027] The aforementioned deceleration cleaning device 10b features a low-tooth-difference planetary reducer 200 configured to connect to the output shaft of the motor 10a. The cleaning mechanism 100 is connected to the power output end of the low-tooth-difference planetary reducer 200. During operation, the cleaning mechanism 100 connects to the motor 10a via the low-tooth-difference planetary reducer 200, thereby providing the cleaning mechanism 100 with reduced power, lowering its rotational speed, and increasing its torque. This increased torque increases the maximum frictional resistance that the cleaning mechanism 100 can overcome, thus increasing its maximum working pressure and improving its cleaning effect.

[0028] It should be noted that the aforementioned frictional resistance refers to the frictional resistance between the working surface and the cleaning mechanism 100, and the aforementioned working pressure refers to the pressure exerted by the cleaning mechanism 100 on the working surface. In some embodiments, the working surface is the ground, the working pressure is the pressure on the ground, and the frictional resistance is the frictional resistance between the ground and the cleaning mechanism 100.

[0029] like Figures 2 to 4 As shown, in some embodiments, the low-tooth-difference planetary reducer 200 includes a fixed internal gear ring 210, an output internal gear ring 220, and a planet carrier 230 coaxially arranged, and planetary gears 240 rotatably connected to the planet carrier 230. The fixed internal gear ring 210 is configured to be fixed relative to the housing of the motor 10a. The fixed internal gear ring 210 can be directly fixed to the housing of the motor 10a, or it can be fixed to the housing of the motor 10a through an intermediate component. The output internal gear ring 220 rotates relative to the fixed internal gear ring 210. The output internal gear ring 220 can be directly rotatably connected to the fixed internal gear ring 210, or it can be rotatably connected to the fixed internal gear ring 210 through an intermediate component. The planet carrier 230 is configured to rotate with the output shaft of the motor 10a. The planet carrier 230 rotates relative to the fixed internal gear ring 210. Specifically, the planet carrier 230 rotates relative to the fixed internal gear ring 210 after power is input to the motor 10a. The planetary gear 240 meshes with the fixed internal gear ring 210 and the output internal gear ring 220 respectively.

[0030] like Figure 2 As shown, in this embodiment, after the motor 10a inputs power, the planetary carrier 230 rotates, the planetary gear 240 revolves and rotates, and the output internal gear ring 220 rotates, causing the output internal gear ring 220 to output torque to drive the cleaning mechanism 100 to rotate and clean the working surface.

[0031] like Figure 2 and Figure 4As shown, in some embodiments, the low-tooth-difference planetary reducer 200 further includes a mounting housing 250, which is configured to be mounted on the housing of the motor 10a, i.e., the mounting housing 250 is configured to be fixedly connected to the housing of the motor 10a. A fixed internal gear ring 210 is fixedly connected within the mounting housing 250, and an output internal gear ring 220 is rotatably connected within the mounting housing 250. In this embodiment, by accommodating the internal structure of the low-tooth-difference planetary reducer 200 within the mounting housing 250, the reduction cleaning device 10b is modularized, improving the ease of installation of the reduction cleaning device 10b onto the motor 10a.

[0032] like Figure 2 and Figure 4 As shown, in some embodiments, the low-tooth-difference planetary reducer 200 further includes a bearing 260, which is installed within the mounting housing 250. The output internal gear ring 220 is sleeved within the bearing 260, allowing the output internal gear ring 220 to be rotatably mounted within the mounting housing 250 via the bearing 260. In this embodiment, the bearing 260 supports the output internal gear ring 220, suppressing its sway, improving its rotational smoothness and stability, reducing internal wear of the reduction and cleaning device 10b, and extending its service life.

[0033] like Figure 2 As shown, in some embodiments, the output internal gear ring 220 includes an internal gear ring body 221 and an output portion 222. The internal gear ring body 221 meshes with the planetary gear 240. The internal gear ring body 221 is configured to rotate with the output shaft of the motor 10a. The output portion 222 is fixedly connected to the internal gear ring body 221, so that the output portion 222 and the internal gear ring body 221 rotate synchronously with the output shaft of the motor 10a. The output portion 222 is also drively connected to the cleaning mechanism 100 to drive the cleaning mechanism 100 to rotate.

[0034] like Figure 2 As shown, in some embodiments, the output section 222 is fixedly covered on one side of the internal gear ring 221, so that the output section 222 and the planet carrier 230 jointly restrict the axial movement of the planet gear 240, ensuring that the planet gear 240 meshes and transmits in a preset position, thereby improving the operational stability of the low tooth difference planetary reducer 200.

[0035] like Figure 2 As shown, in some embodiments, the low-tooth-difference planetary reducer 200 further includes a drive shaft 280, an output portion 222 fixedly sleeved on the outside of the drive shaft 280, and a cleaning mechanism 100 fixedly sleeved on the outside of the drive shaft 280, so that the output portion 222 is connected to the cleaning mechanism 100 via the drive shaft 280. Further, the drive shaft 280 has a flat portion, and both the output portion 222 and the cleaning mechanism 100 are fixed to the flat portion.

[0036] like Figure 2 As shown, in some embodiments, the fixed internal gear ring 210 has Z1 teeth, and the output internal gear ring 220 has Z2 teeth. The planetary gear 240 includes a first planetary gear 241 and a second planetary gear 242. The first planetary gear 241 and the second planetary gear 242 are coaxially arranged and rotate at the same speed, connected to the planet carrier 230; that is, the first planetary gear 241 and the second planetary gear 242 are coaxially arranged and rotatably connected to the planet carrier 230, and the first planetary gear 241 and the second planetary gear 242 rotate at the same speed. The first planetary gear 241 has Z2 teeth. a The number of teeth on the second planetary gear 242 is Z. b Z a Z2 is greater than or less than Z1. b Z a Z2 is not equal to Z1. b The output internal gear ring 220 is configured to output torque.

[0037] It is understood that the planetary gear 240 can be a one-piece molded structure, that is, although the planetary gear 240 includes the first planetary gear 241 and the second planetary gear 242, each planetary gear 240 includes only one part; the first planetary gear 241 and the second planetary gear 242 can also be a modular structure, that is, the two are assembled together after being manufactured independently.

[0038] In this embodiment, the number of teeth and rotational speed of each component of the low-tooth-difference planetary reducer are set as follows: By adding a common speed -n3 to the planetary reducer with small tooth difference, the speeds of the various components of the planetary reducer with small tooth difference are transformed into the following values: The transmission ratio between the fixed internal gear ring and the first planetary gear is: The transmission ratio between the second planetary gear and the output internal gear ring: The transmission ratio of the entire low-tooth-difference planetary reducer is: Cross-multiplication Expand Transpose Factoring out common factors From the derived transmission ratio formula, it can be seen that as long as the denominator is not zero, the reduction and transmission of the planetary reducer with a small tooth difference can be achieved, so that the output internal gear ring outputs torque to drive the cleaning mechanism to rotate. Therefore, Z a Z2 is greater than or less than Z1. b Z a Z2 is not equal to Z1. b .

[0039] like Figure 2 As shown, in some embodiments, the fixed internal gear ring 210 and the output internal gear ring 220 have different numbers of teeth, that is, the number of teeth of the fixed internal gear ring 210 is greater than or less than the number of teeth of the output internal gear ring 220. Further, the first planetary gear 241 and the second planetary gear 242 have the same number of teeth, so that the output internal gear ring 220 can output torque, thereby driving the cleaning mechanism 100 to rotate.

[0040] In other embodiments, the fixed internal gear ring 210 and the output internal gear ring 220 have the same number of teeth. The first planetary gear 241 and the second planetary gear 242 have different numbers of teeth, that is, the number of teeth of the first planetary gear 241 is greater than or less than the number of teeth of the second planetary gear 242, such that Z a Z2 is not equal to Z1. b This is so that the output internal gear ring 220 can output the reduced torque.

[0041] like Figure 2 As shown, in some embodiments, the planetary carrier 230 includes a carrier body 231 and a connecting shaft 232. The carrier body 231 is configured to rotate with the output shaft of the motor 10a, and the connecting shaft 232 is connected to the carrier body 231. The planetary gear 240 has a combined structure, with the first planetary gear 241 and the second planetary gear 242 respectively sleeved on the connecting shaft 232. In this embodiment, the first planetary gear 241 and the second planetary gear 242 are two independent parts, which are mounted on the planetary carrier 230 after manufacturing via the connecting shaft 232. Since the first planetary gear 241 and the second planetary gear 242 are not integrally formed, the length of a single planetary gear 240 is avoided from being too large, the bending stress of the planetary gear 240 is reduced, the risk of breakage of the planetary gear 240 is reduced, and the service life of the planetary gear 240 is extended.

[0042] like Figure 2 As shown, in some embodiments, there are multiple planetary gears 240, which are spaced apart circumferentially along the fixed internal gear ring 210, reducing stress concentration in the transmission chain and extending the service life of the low-tooth-difference planetary reducer 200.

[0043] like Figure 2As shown, preferably, multiple planetary gears 240 are evenly distributed around the fixed internal gear ring 210, which makes the force on the transmission chain more uniform, further reduces the stress concentration of the transmission chain, and further extends the service life of the low tooth difference planetary reducer 200.

[0044] like Figure 2 As shown, in some embodiments, the low-tooth-difference planetary reducer 200 further includes a sun gear 270 that meshes with a planetary gear 240. The sun gear 270 is configured to connect to the output shaft of the motor 10a, and also meshes with the planetary gear 240. In this embodiment, the output shaft of the external motor 10a drives the sun gear 270 to rotate, which in turn drives the planetary gear 240 to rotate. The planetary gear 240 is forced to roll circumferentially along the fixed internal gear ring 210, which in turn drives the planet carrier 230 to rotate. The planetary gear 240 also drives the output internal gear ring 220 to rotate, thereby causing the cleaning mechanism 100 to rotate.

[0045] Of course, such as Figure 2 As shown, in other embodiments, the sun gear 270 can be omitted, and the planet carrier 230 is configured to be connected to the output shaft of the motor 10a. In this embodiment, the output shaft of the external motor 10a directly drives the planet carrier 230 to rotate, the planet carrier 230 drives the planet gear 240 to rotate, causing the planet gear 240 to roll circumferentially along the fixed internal gear ring 210, and the planet gear 240 drives the output internal gear ring 220 to rotate, thereby causing the cleaning mechanism 100 to rotate.

[0046] It is understandable that regardless of whether the output shaft of motor 10a is directly connected to the sun gear 270 or directly connected to the planet carrier 230, the planet carrier 230 rotates with the output shaft of motor 10a.

[0047] like Figure 2 As shown, in some embodiments, the sun gear 270 is sleeved on the drive shaft 280, so that the drive shaft 280 plays the role of supporting the sun gear 270, improving the rotational smoothness of the sun gear 270 and reducing the yaw of the sun gear 270 during rotation.

[0048] In some embodiments, the cleaning mechanism 100 includes a cloth tray with a cloth surface on one side adjacent to the work surface, the cloth surface being used to contact the work surface. When the cleaning mechanism 100 rotates, the cloth surface rubs against the work surface to clean it.

[0049] like Figure 2As shown, preferably, the cleaning mechanism 100 further includes a lifting assembly 110, the power output end of which is connected to the power output end of the low-tooth-difference planetary reducer 200, and the mop tray is connected to the power output end of the lifting assembly 110. In this embodiment, the lifting assembly 110 is configured to drive the mop tray to rise and fall, for example, when there are obstacles, carpets, etc. on the work surface, the lifting assembly 110 drives the mop tray to rise.

[0050] It should be noted that the lifting assembly 110 is prior art. CN119214538A mentioned in the background art reveals the specific structure of the lifting assembly 110, which will not be repeated in this disclosure.

[0051] like Figure 2 As shown, this embodiment of the present disclosure also provides a cleaning module 10, including a motor 10a and a speed-reducing cleaning device 10b as described in any of the above embodiments. The mounting housing 250 of the low-tooth-difference planetary reducer 200 is fixedly connected to the mounting housing 250 of the motor 10a, and the power output end of the low-tooth-difference planetary reducer 200 is drively connected to the output shaft of the motor 10a.

[0052] like Figure 2 As shown, in some embodiments, the output shaft of the motor 10a passes through the planetary carrier 230 and is fixedly connected to the planetary carrier 230, so that the power of the motor 10a is directly output to the planetary carrier 230, thereby causing the planetary carrier 230 to rotate with the output shaft of the motor 10a.

[0053] like Figure 2 As shown, in some other embodiments, the planetary carrier 230 is rotatably sleeved on the output shaft of the motor 10a, and the planetary carrier 230 is not directly connected to the output shaft of the motor 10a. The sun gear 270 is fixedly sleeved on the output shaft of the motor 10a, so that the power of the motor 10a is directly output to the sun gear 270.

[0054] This disclosure also provides a cleaning device, including a body and a cleaning module 10 as described in any of the above embodiments, wherein the cleaning module 10 is installed at the bottom of the body.

[0055] It is understood that cleaning equipment refers to robotic vacuum cleaners, robotic mops, robotic vacuum and mop combos, robotic floor scrubbers, or other existing cleaning equipment.

[0056] Compared with the prior art, this application has at least the following advantages: The low-tooth-difference planetary reducer 200 is configured to connect to the output shaft of the motor 10a. The cleaning mechanism 100 is connected to the power output end of the low-tooth-difference planetary reducer 200. During operation, the cleaning mechanism 100 connects to the motor 10a via the low-tooth-difference planetary reducer 200, thereby providing the cleaning mechanism 100 with reduced power, lowering its rotational speed, and increasing its torque. This increased torque increases the maximum frictional resistance that the cleaning mechanism 100 can overcome, thus increasing its maximum working pressure and improving its cleaning effect.

[0057] The embodiments described above are merely illustrative of 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 disclosed patent. 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 deceleration cleaning device, comprising a cleaning mechanism (100), characterized in that, The deceleration cleaning device also includes: A low-tooth-difference planetary reducer (200) is configured to be mounted in the housing of a motor (10a), the power input end of the low-tooth-difference planetary reducer (200) is configured to be connected to the output shaft of the motor (10a), and the power output end of the low-tooth-difference planetary reducer (200) is connected to the cleaning mechanism (100).

2. The deceleration cleaning device according to claim 1, characterized in that, The low-tooth-difference planetary reducer (200) includes a fixed internal gear ring (210), an output internal gear ring (220), and a planet carrier (230) arranged coaxially, and a planetary gear (240) rotatably connected to the planet carrier (230); The fixed internal gear ring (210) is configured to be fixed relative to the housing of the motor (10a), the output internal gear ring (220) rotates relative to the fixed internal gear ring (210), and the planetary carrier (230) is configured to rotate with the output shaft of the motor (10a); the planetary gear (240) meshes with the fixed internal gear ring (210) and the output internal gear ring (220) respectively.

3. The deceleration cleaning device according to claim 2, characterized in that, The low-tooth-difference planetary reducer (200) also includes a mounting housing (250), which is configured to be mounted on the motor (10a). The fixed internal gear ring (210) is fixedly connected to the mounting housing (250), and the output internal gear ring (220) is rotatably connected to the mounting housing (250).

4. The deceleration cleaning device according to claim 3, characterized in that, The low-tooth-difference planetary reducer (200) also includes a bearing (260), and the output internal gear ring (220) is mounted in the mounting housing (250) via the bearing (260).

5. The deceleration cleaning device according to claim 2, characterized in that, The number of teeth of the fixed internal gear ring (210) is greater than or less than the number of teeth of the output internal gear ring (220).

6. The deceleration cleaning device according to claim 2, characterized in that, The planetary gear (240) includes a first planetary gear (241) and a second planetary gear (242), which are coaxially arranged and rotatably connected to the planet carrier (230); The first planetary gear (241) meshes with the fixed internal gear ring (210), and the second planetary gear (242) meshes with the output internal gear ring (220); the number of teeth of the first planetary gear (241) is greater than or less than the number of teeth of the second planetary gear (242), and the number of teeth of the fixed internal gear ring (210) and the output internal gear ring (220) are the same.

7. The deceleration cleaning device according to claim 2, characterized in that, The low-tooth-difference planetary reducer (200) also includes a sun gear (270) configured to connect to the output shaft of the motor (10a) and mesh with the planetary gear (240).

8. The deceleration cleaning device according to any one of claims 1 to 7, characterized in that, The cleaning mechanism (100) includes a cloth tray.

9. A cleaning module, characterized in that, The device includes a motor (10a) and a speed-reducing cleaning device (10b) according to any one of claims 1 to 8, wherein the low-tooth-difference planetary reducer (200) is mounted on the housing of the motor (10a), and the power input end of the low-tooth-difference planetary reducer (200) is connected to the output shaft of the motor (10a).

10. A cleaning device, characterized in that, It includes a body and the cleaning module (10) as described in claim 9, wherein the motor (10a) is mounted on the bottom of the body.

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