Multi-head rotating device, electric cleaning brush and electric tool

Abstract

The utility model discloses a multi-head rotating device, an electric cleaning brush and an electric tool, and belongs to the technical field of electric tools, the multi-head rotating device comprises a power mechanism, a transmission mechanism and a working mechanism, the transmission mechanism comprises an inner shaft and an outer shaft, the working mechanism comprises an inner disc body and a transmission wheel, and the inner disc body is provided with a rotating head. The inner disc body rotating along with the inner shaft drives the rotating head to revolve around the central axis of the inner disc body, and the transmission wheel rotating along with the outer shaft drives the rotating head rotating around the central axis of the rotating head at the same time. The electric cleaning brush comprises the multi-head rotating device. The electric tool comprises the multi-head rotating device. Due to the fact that all the rotating heads are arranged on the inner disc body, the inner disc body and all the rotating heads can serve as an installation module, when the transmission wheel drives all the rotating heads to rotate through gear matching, transmission matching of all the rotating heads and the transmission wheel can be achieved while the inner disc body is connected to the inner shaft, all the rotating heads do not need to be installed one by one, and the assembling efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a multi-head rotating device. The utility model also relates to an electric cleaning brush and an electric tool adopting the multi-head rotating device. Background Art

[0002] With the improvement of industrialization level, the types and functions of electric tools are becoming more and more diversified. Among them, electric cleaning brush is a common electric tool. The existing electric cleaning brush generally includes a housing, a motor and a brush disc. The motor drives the brush disc to rotate. The rotating brush disc scrapes the object to be cleaned or the surface to be cleaned. The electric cleaning brush can be used not only for cleaning vehicles, but also for cleaning kitchen items, floors, walls, etc., which greatly reduces the cleaning difficulty of users. The existing electric cleaning brush has a structure with multiple rotating brush heads. The transmission structure of the electric cleaning brush is provided with a revolution bracket and a self-rotation shaft. The self-rotation shaft is distributed circumferentially around the revolution bracket. Each rotating brush head is connected to the self-rotation shaft. The revolution bracket drives each rotating brush head to revolve around the central axis of the revolution bracket, and the self-rotation shaft drives each rotating brush head to rotate around its own central axis. Since the rotating brush head is connected to the corresponding self-rotation shaft, the user needs to replace the rotating brush head one by one when replacing it, and the installation efficiency is low. In addition, due to the large radial size of the revolution bracket, other brush discs cannot be set, which is not conducive to improving the scraping efficiency. Utility Model Content

[0003] In order to solve the shortcomings and deficiencies existing in the above-mentioned prior art, the utility model provides a multi-head rotating device, in which each rotating head is arranged on an inner disk body. The inner disk body and each rotating head can be used as an installation module. When the transmission wheel drives each rotating head to rotate through gear cooperation, the transmission cooperation between each rotating head and the transmission wheel can be realized while connecting the inner disk body to the inner shaft. There is no need to install each rotating head one by one, which is conducive to improving assembly efficiency.

[0004] In order to achieve the above-mentioned technical objectives, the multi-head rotating device provided by the utility model includes a power mechanism, a transmission mechanism and a working mechanism. The transmission mechanism includes an inner shaft and an outer shaft coaxially sleeved inside and outside. The power mechanism drives the inner shaft and the outer shaft to rotate in the same direction or in the opposite direction. The working mechanism includes an inner disk body driven to rotate by the inner shaft and a transmission wheel driven to rotate by the outer shaft. A plurality of rotating heads distributed along the circumferential direction are provided on the inner disk body. The inner disk body rotating with the inner shaft drives the rotating head to revolve around the central axis of the inner disk body. The transmission wheel rotating with the outer shaft drives the revolving rotating head to rotate around its own central axis at the same time.

[0005] Preferably, the working mechanism further comprises an outer disc body driven to rotate by the outer shaft, and the inner disc body is arranged on the inner periphery of the outer disc body.

[0006] Preferably, the transmission wheel is fixed on the outer disc body.

[0007] Preferably, the outer disc body is provided with a cavity which is formed upwardly concave from the lower surface and is used to accommodate the inner disc body, and the transmission wheel is arranged in the cavity.

[0008] Preferably, each of the rotating heads is provided with a pinion gear meshing with a transmission wheel, and the transmission wheel rotating along with the outer shaft drives each rotating head to rotate around its own central axis by meshing with the pinion gear.

[0009] Preferably, the rotating head comprises a shaft column and a rotating disc body arranged at the lower end of the shaft column, and the pinion gear is sleeved on the shaft column and the pinion gear and the shaft column are arranged concentrically.

[0010] Preferably, the inner disc body is provided with a shell forming an accommodating cavity, the shaft column and the pinion are arranged in the accommodating cavity, and the shell is provided with an avoidance notch for the pinion to mesh with the transmission wheel.

[0011] Preferably, an axial limiting structure for axially limiting the rotating head is provided between the rotating head and the housing.

[0012] The utility model also provides an electric cleaning brush, comprising a casing and the multi-head rotating device described above, wherein the power mechanism and the transmission mechanism are arranged inside the casing, and the working mechanism is arranged outside the casing.

[0013] The utility model also provides an electric tool, comprising the multi-head rotating device described above.

[0014] After adopting the above technical solution, the utility model has the following advantages:

[0015] 1. The multi-head rotating device provided by the utility model has an inner shaft and an outer shaft as the transmission mechanism, an inner disc, a rotating head and a transmission wheel as the working mechanism, the inner disc is driven by the inner shaft, and the transmission wheel is driven by the outer shaft. When the device is working, the inner shaft drives the inner disc to rotate, and the rotating inner disc drives each rotating head to revolve around the central axis of the inner disc, and the outer shaft drives the transmission wheel to rotate, and the rotating transmission wheel drives each rotating head to rotate around its own central axis. The structure for driving each rotating head to revolve and rotate is reasonably set. Since each rotating head is arranged on the inner disc, the inner disc and each rotating head can be used as an installation module. When the transmission wheel drives each rotating head to rotate by gear cooperation, the transmission cooperation between each rotating head and the transmission wheel can be realized while connecting the inner disc to the inner shaft. There is no need to install each rotating head one by one, which is conducive to improving assembly efficiency.

[0016] 2. The working mechanism also includes an outer disc, and the inner disc is arranged on the inner periphery of the outer disc. When the device is working, the inner shaft drives each rotating head to revolve through the inner disc, and the outer shaft drives the outer disc and the transmission wheel to rotate at the same time, and the rotating transmission wheel drives each rotating head to rotate. The specific structure of the working mechanism is reasonably set, and an outer disc is added on the basis of multiple rotating heads arranged on the inner disc, so as to reasonably increase the number of working parts of the working mechanism, thereby increasing the working area of ​​the working mechanism and improving the working efficiency of the device.

[0017] 3. The transmission wheel is preferably fixed on the outer disc body. When installing, you only need to connect the outer disc body to the outer shaft to connect the transmission wheel to the outer shaft at the same time. The rotating outer shaft can drive the transmission wheel to rotate synchronously through the outer disc body. Reasonable setting of the connection relationship between the transmission wheel and the outer disc body can reduce the components that the user needs to install, while meeting the transmission requirements of the transmission wheel driven by the outer shaft.

[0018] 4. A concave cavity is arranged on the outer disc body, the transmission wheel is arranged in the concave cavity, and the inner disc body connected to the inner shaft is located in the concave cavity. The specific structure of the outer disc body and the position of the transmission wheel relative to the outer disc body are reasonably arranged so that the transmission wheel can smoothly cooperate with each rotating head in transmission, and the transmission cooperation structure composed of the transmission wheel and each rotating head is also accommodated in the concave cavity, so as to avoid the transmission wheel and each rotating head being affected by other components or external objects, thereby ensuring the stability of the self-rotation of each rotating head driven by the transmission wheel.

[0019] 5. Each rotating head is provided with a small gear, which meshes with the transmission wheel. The transmission wheel that rotates with the outer shaft drives each rotating head to rotate around its own central axis through meshing with the small gear. The transmission matching structure between the transmission wheel and each rotating head is reasonably set so that the transmission wheel can smoothly drive each rotating head to rotate, and the transmission matching structure between the transmission wheel and each rotating head is also kept compact.

[0020] 6. The rotating head is provided with a shaft column and a rotating disc body, and the pinion is sleeved on the shaft column. Moreover, the pinion and the shaft column are arranged concentrically. The specific structure of the rotating head is reasonably arranged so that the pinion meshing with the transmission wheel can smoothly drive the rotating head to rotate. The pinion drives the rotating head to rotate around its own central axis. The outer diameter of the rotating head itself is the rotation range of the rotating head, so that the working mechanism can keep the structure compact.

[0021] 7. The pinion gear is arranged in the accommodating cavity formed by the shell, and the specific structure of the inner disk is reasonably arranged so that the pinion gear is located inside the inner disk body, so that the pinion gear is kept clean, which helps to improve the structural stability of the pinion gear and the rotating head, and also helps to improve the stability of the transmission wheel driving each rotating head to rotate by meshing with the pinion gear. The shell is provided with an avoidance notch, and each pinion gear partially extends out of the inner disk body from the avoidance notch, so that the pinion gear can smoothly mesh with the transmission wheel.

[0022] 8. An axial limiting structure is provided between the rotating head and the housing, and the rotating head is axially limited by the axial limiting structure to ensure the structural stability of the rotating head arranged on the inner disk body and avoid axial deviation of the rotating head during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a multi-head rotating device according to Embodiment 1;

[0024] Figure 2 It is a structural diagram of the outer disc body in the multi-head rotating device of Example 1;

[0025] Figure 3 It is a structural diagram of the transmission wheel in the multi-head rotating device of Example 1;

[0026] Figure 4 It is an axial cross-sectional view of the outer disc body and the transmission wheel in the multi-head rotating device of Example 1;

[0027] Figure 5 This is a diagram showing the matching structure of the inner disk and the rotating head in the multi-head rotating device of Example 1;

[0028] Figure 6 An exploded view of the inner disc body, the rotating head and the pinion gear in the multi-head rotating device of Example 1;

[0029] Figure 7 It is a structural diagram of the rotating head in the multi-head rotating device of Example 1;

[0030] Figure 8 It is an axial cross-sectional view of the inner disc body, the rotating head and the pinion gear in the multi-head rotating device of Example 1;

[0031] Fig. 9 This is a diagram showing the coordination structure of the inner disk, the rotating head and the transmission wheel in the multi-head rotating device of the first embodiment;

[0032] Fig.10 It is a structural diagram of the power mechanism and the transmission mechanism in the multi-head rotating device of Example 1;

[0033] Fig.11 It is an exploded view of the power mechanism and the transmission mechanism in the multi-head rotating device of Example 1;

[0034] Fig.12 It is a structural diagram of the inner shaft and the clamping joint in the multi-head rotating device of Example 1;

[0035] Fig.13 This is a structural diagram of a clamping joint in a multi-head rotating device of Example 1;

[0036] Fig.14 It is an axial cross-sectional view of the power mechanism and the transmission mechanism in the multi-head rotating device of Example 1;

[0037] Fig.15 This is a structural diagram of an electric cleaning brush according to Embodiment 1;

[0038] Fig.16 It is an exploded view of the transmission mechanism in the multi-head rotating device of the second embodiment;

[0039] Fig.17 It is a structural diagram of the transmission mechanism in the multi-head rotating device of Example 2.

[0040] In the figure, 1-multi-head rotating device,

[0041] 100-power mechanism, 110-motor, 120-reducer, 121-output shaft,

[0042] 200-working mechanism, 210-inner disk body, 211-shell, 212-accommodating chamber, 213-limiting rod, 214-avoidance gap, 215-clamping hole, 216-spindle, 220-transmission wheel, 221-center through hole, 222-groove, 230-rotating head, 231-shaft column, 232-rotating disk body, 233-axial limiting part, 234-axial limiting groove, 240-pinion, 250-outer disk body, 251-concave cavity, 252-convex ring, 253-protrusion, 254-internal thread, 260-axial limiting structure,

[0043] 300-transmission mechanism, 310-inner shaft, 311-gear part, 312-card joint, 313-card block, 320-outer shaft, 321-external thread, 330-connecting sleeve, 340-first bearing group, 350-second bearing group, 360-bracket, 361-gear ring, 370-planetary gear, 371-upper gear part, 372-lower gear part, 381-upper planet carrier, 382-lower planet carrier, 390-support shaft, 31-driving wheel, 32-first planetary gear, 33-first planet carrier, 34-sun gear, 35-secondary planetary gear, 36-secondary planet carrier, 37-gear ring cylinder, 38-connecting shaft, 39-connecting cylinder,

[0044] 2-housing, 21-handle, 3-battery pack, 4-auxiliary handle. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0046] Embodiment 1

[0047] Combination Figures 1 to 14 The multi-head rotating device 1 provided in the first embodiment of the utility model comprises a power mechanism 100, a transmission mechanism 300 and a working mechanism 200. The transmission mechanism 300 comprises an inner shaft 310 and an outer shaft 320 which are coaxially sleeved inside and outside. The power mechanism 100 drives the inner shaft 310 and the outer shaft 320 to rotate in the same direction or in the opposite direction. The working mechanism 200 comprises an inner disk body 210 driven to rotate by the inner shaft 310 and a transmission wheel 220 driven to rotate by the outer shaft 320. A plurality of rotating heads 230 distributed along the circumferential direction are arranged on the inner disk body 210. The inner disk body 210 rotating with the inner shaft 310 drives the rotating heads 230 to revolve around the central axis L1 of the inner disk body 210. The transmission wheel 220 rotating with the outer shaft 320 drives the rotating rotating heads 230 to rotate around their own central axis L2 at the same time.

[0048] A structure for driving each rotating head 230 to revolve and rotate is reasonably arranged. Since each rotating head 230 is arranged on the inner disk body 210, the inner disk body 210 and each rotating head 230 can be used as an installation module. When the transmission wheel 220 drives each rotating head 230 to rotate through gear cooperation, the transmission cooperation between each rotating head 230 and the transmission wheel 220 can be achieved while connecting the inner disk body 210 to the inner shaft 310. There is no need to install each rotating head 230 one by one, which is beneficial to improving assembly efficiency.

[0049] Combination Figure 1 , Figure 2 In this embodiment, the working mechanism 200 also includes an outer disk body 250 driven to rotate by the outer shaft 320, and the inner disk body 210 is arranged on the inner circumference of the outer disk body 250. The outer disk body 250 is added on the basis of the multiple rotating heads 230 arranged on the inner disk body 210, so as to reasonably increase the number of working parts of the working mechanism 200, thereby increasing the working area of ​​the working mechanism 200 and improving the working efficiency of the device. The transmission wheel 220 is preferably fixed on the outer disk body 250. During installation, the outer disk body 250 can be connected to the outer shaft 320 to simultaneously connect the transmission wheel 220 to the outer shaft 320. The rotating outer shaft 320 can drive the transmission wheel 220 to rotate synchronously through the outer disk body 250. In combination with Figure 3 , Figure 4Specifically, the outer disc body 250 is provided with a concave cavity 251 which is formed upward from the lower surface and is used to accommodate the inner disc body 210. The top wall of the outer disc body 250 is provided with a convex ring 252 extending up and down. The convex ring 252 is surrounded to form a through opening. The transmission wheel 220 is annular and has a central through hole 221. The transmission wheel 220 is arranged in the concave cavity 251 and sleeved on the outer shaft of the convex ring 252. The transmission wheel 220 is fixedly connected to the top wall of the outer disc body 250. The cooperation between the convex ring 252 and the transmission wheel 220 can limit the transmission wheel 220 in radial direction. In addition, the convex ring 252 is provided with a protrusion 253 protruding outward, and the transmission wheel 220 is provided with a groove 222 cooperating with the protrusion 253. The protrusion 253 is embedded in the groove 222. The transmission wheel 220 can be circumferentially limited by the cooperation between the protrusion 253 and the groove 222. The connection stability between the transmission wheel 220 and the outer disk body 250 is improved by the cooperation between the convex ring 252 and the transmission wheel 220 and the cooperation between the protrusion 253 and the groove 222, thereby ensuring the rotation synchronization of the transmission wheel 220 and the outer disk body 250.

[0050] In this embodiment, the outer disk body 250 is detachably connected to the lower end of the outer shaft 320 through a threaded structure. The tightening direction of the threaded structure is preferably opposite to the rotation direction of the outer shaft 320. When the outer shaft 320 drives the outer disk body 250 to rotate synchronously, the threaded structure can be tightened more and more to prevent the outer disk body 250 from being loosened during the rotation process. Specifically, the outer disk body 250 is provided with an internal thread 254 on the inner wall of the convex ring 252, and the outer wall of the lower end of the outer shaft 320 is provided with an external thread 321. The outer disk body 250 is detachably connected to the lower end of the outer shaft 320 through the cooperation of the internal thread 254 and the external thread 321. The tightening direction of the internal thread 254 and the external thread 321 is opposite to the rotation direction of the outer shaft 320. If the outer shaft 320 rotates in the clockwise direction, the internal thread 254 rotates in the counterclockwise direction to tighten with the external thread 321, and the internal thread 254 rotates in the clockwise direction to loosen with the external thread 321.

[0051] Combination Figure 5 , Figure 6 In this embodiment, each rotating head 230 is provided with a pinion 240 meshing with the transmission wheel 220. The transmission wheel 220 rotates along with the outer shaft 320 and drives each rotating head 230 to rotate around its own central axis L2 by meshing with the pinion 240. Figure 7 The rotating head 230 includes a shaft column 231 and a rotating disc 232 disposed at the lower end of the shaft column 231. The pinion 240 is sleeved on the shaft column 231 and the pinion 240 and the shaft column 231 are concentrically disposed. Figure 5 , Figure 8In order to set the rotating head 230 and the pinion 240, the top side of the inner disk body 210 is provided with a housing 211 forming a receiving chamber 212, the shaft column 231 and the pinion 240 are arranged in the receiving chamber 212, the shaft column 231 is rotatably arranged through a bearing, the housing 211 is provided with an avoidance notch 214 for the pinion 240 to mesh with the transmission wheel 220, and a part of each pinion 240 extends out of the inner disk body 210 from the avoidance notch 214, so that the pinion 240 can smoothly mesh with the transmission wheel 220. Further, the pinion 240 and the transmission wheel 220 adopt an external meshing structure, the transmission wheel 220 is arranged at the center of the outer disk body 250, the avoidance notch 214 is arranged on the side of the housing 211 facing the center of the inner disk body 210, and each pinion 240 is located at the outer periphery of the transmission wheel 220. As an alternative to this embodiment, the pinion 240 may be integrally formed with the rotating head 230, and the transmission wheel 220 may be integrally formed with the outer disk 250. As an alternative to this embodiment, the pinion 240 on each rotating head 230 and the transmission wheel 220 may also adopt an internal meshing structure. In this case, the transmission wheel 220 may be arranged in contact with the annular inner wall of the concave cavity 251, and each pinion 240 is located on the inner periphery of the transmission wheel 220.

[0052] In order to keep the rotating head 230 axially stable, an axial limiting structure 260 is provided between the rotating head 230 and the housing 211 to limit the rotating head 230 axially. Figure 6 , Figure 7 , Figure 8 In this embodiment, the rotating head 230 also includes an axial limiting portion 233 disposed between the shaft column 231 and the rotating disk body 232. A circle of axial limiting grooves 234 are disposed on the outer wall of the axial limiting portion 233. Two parallel limiting rods 213 are disposed on the housing 211. The axial direction of the limiting rod 213 is perpendicular to the axial direction of the rotating head 230. A part of the limiting rod 213 is stuck in the axial limiting groove 234. The axial limiting structure 260 includes the axial limiting groove 234 and the limiting rod 213. The limiting rod 213 cooperates with the axial limiting groove 234 to limit the rotating head 230 in the axial direction, thereby preventing the rotating head 230 from being separated from the inner disk body 210. Of course, the axial limiting structure 260 is not limited to the structure in which the axial limiting groove 234 and the limiting rod 213 cooperate, and other structures that can limit the rotating head 230 in the axial direction can also be adopted.

[0053] In this embodiment, the inner disk 210 is detachably connected to the lower end of the inner shaft 310 through a snap-fit ​​structure. The clamping direction of the snap-fit ​​structure is preferably opposite to the rotation direction of the inner shaft 310. When the inner shaft 310 drives the inner disk 210 to rotate synchronously, the snap-fit ​​structure can be tightened as it rotates, thereby preventing the inner disk 210 from loosening during the rotation process. Fig.12 , Fig.13Specifically, a clamping joint 312 extending out of the outer shaft 320 is fixed to the lower end of the inner shaft 310, and a plurality of clamping blocks 313 are arranged on the outer circumferential surface of the clamping joint 312 at intervals along the circumferential direction. Fig. 9 The center of the inner disk body 210 is provided with a clamping hole 215 that matches the clamping joint 312, and the inner wall of the clamping hole 215 is provided with a turn button 216 corresponding to the clamping block 313. The inner disk body 210 is detachably connected to the lower end of the inner shaft 310 through the turn button 216 on the inner wall of the clamping hole 215 and the clamping block 313 on the outer peripheral surface of the clamping joint 312. The central through hole 221 on the transmission wheel 220 can avoid the clamping hole 215. The clamping direction of the clamping hole 215 and the clamping joint 312 is set opposite to the rotation direction of the inner shaft 310. If the inner shaft 310 rotates in the counterclockwise direction, the clamping hole 215 rotates in the clockwise direction to clamp the clamping joint 312, and the clamping hole 215 rotates in the counterclockwise direction to disengage from the clamping joint 312.

[0054] In this embodiment, the power mechanism 100 preferably drives the inner disk 210 and the outer disk 250 to rotate in opposite directions through the transmission mechanism 300. Fig.10 , Fig.11 , Fig.14The power mechanism 100 includes a motor 110 and a reducer 120. The reducer 120 includes an input shaft, an output shaft 121 and a planetary gear reduction structure. The planetary gear reduction structure is arranged between the input shaft and the output shaft 121. The rotating shaft of the motor 110 is drivingly connected to the input shaft of the reducer 120. The upper end of the inner shaft 310 is directly drivingly connected to the output shaft 121 of the reducer 120 through a connecting sleeve 330. The outer shaft 320 is axially hollow. The inner shaft 310 is rotatably mounted inside the outer shaft 320 through a first bearing group 340. The outer shaft 320 is rotatably arranged through a second bearing group 350. The upper end of the inner shaft 310 is provided with a gear portion 311 located above the outer shaft 320. The transmission assembly 300 also includes a bracket 360, a planetary gear 370, an upper planetary carrier 381 and a lower planetary carrier 382. The bracket 360 is fixed to the bottom of the reducer 120. The lower part of the bracket 360 is provided with a ring gear 361. The upper planetary carrier 381 is arranged at the bottom of the bracket 360. The lower planetary carrier 382 is located below the upper planetary carrier 381. The planetary gear 370 is mounted between the upper planetary carrier 381 and the lower planetary carrier 382 through a support shaft 390. The upper end of the support shaft 390 is fixedly connected to the upper planetary carrier 381, and the lower end of the support shaft 390 is fixedly connected to the lower planetary carrier 382. The upper end of the outer shaft 320 is fixedly connected to the upper planetary carrier 381. The ring gear 361 on the bracket 360 and the gear part 311 on the inner shaft 310 are distributed up and down, and two or three planetary gears 370 are evenly spaced along the circumferential direction, and each planetary gear 370 includes an upper tooth part 371 meshing with the ring gear 361 and a lower tooth part 372 meshing with the gear part 311. When the motor 110 is working, the power is output to the outside through the output shaft 121 of the reducer 120, and the output shaft 121 drives the inner shaft 310 to rotate synchronously through the connecting sleeve 330. The rotating inner shaft 310 drives the upper planetary carrier 381 and the lower planetary carrier 382 to rotate through the meshing of the gear part 311 and the planetary gear 370, and the lower planetary carrier 382 drives the outer shaft 320 to rotate synchronously. Since the gear portion 311 and the planetary gear 370 are meshed with each other and their rotation directions are opposite, the rotation directions of the inner shaft 310 and the lower planetary carrier 382 are opposite, and thus the rotation directions of the inner shaft 310 and the outer shaft 320 are also opposite, thereby achieving the purpose of the motor 110 driving the inner shaft 310 and the outer shaft 320 of the transmission mechanism 300 to rotate in the opposite direction, and the reversely rotating inner shaft 310 and outer shaft 320 drive the inner disk body 210 and the outer disk body 250 to rotate in the opposite direction.

[0055] Combination Fig.15The present embodiment also provides an electric cleaning brush, comprising a housing 2 and the multi-head rotating device 1 described above, wherein the power mechanism 100 and the transmission mechanism 300 are arranged inside the housing 2, and the working mechanism 200 is arranged outside the housing 2. In the present embodiment, the housing 2 is formed with a handle 21 extending substantially in the front-rear direction, the multi-head rotating device 1 is arranged at the front end of the handle 21, and the axial direction of the multi-head rotating device 1 is arranged substantially perpendicular to the extending direction of the handle 21. The electric cleaning brush can be powered by a battery pack 3, or by connecting a power cord to the mains. When the battery pack 3 is used for power supply, the battery pack 3 can be arranged at the rear end of the handle 21 through a detachable docking structure. In the present embodiment, cleaning accessories can be arranged on the lower surface of the outer disk 250 and the lower surface of each rotating head 230. The cleaning accessories can be bristles, sponges, scouring pads, etc. The cleaning accessories arranged on the lower surface of the outer disk 250 and the cleaning accessories arranged on the lower surface of each rotating head 230 can be made of the same material or different materials. Of course, the cleaning accessories can also be arranged on the lower surface of the inner disk 210. Cleaning accessories such as sponges and scouring pads can be fixed or detachable. In order to improve the cleaning effect, the electric cleaning brush is also provided with an auxiliary handle 4, which is hinged to the housing 2 and can rotate left and right, so that the user can adjust the angle of the auxiliary handle 4 relative to the housing 2.

[0056] The present embodiment also provides an electric tool, which includes the multi-head rotating device 1 described above. The electric tool of the present embodiment can be a tool for surface treatment, such as a grinder, a waxer, a polisher, etc. In this case, surface treatment accessories such as sandpaper and a grinding wheel can be set on the lower surface of the outer disk 250 and each rotating head 230. The surface treatment accessories can be fixed or detachable. When the surface treatment accessories are detachable, the user can replace them according to specific work needs to meet the needs of one machine for multiple uses. Other structures of the electric tool can refer to the prior art and will not be repeated here.

[0057] As an alternative to this embodiment, the transmission wheel 220 can also drive each rotating head 230 to rotate by other transmission methods such as belt transmission or chain transmission.

[0058] Embodiment 2

[0059] Combination Fig.16 , Fig.17In this embodiment, the power mechanism drives the inner disk and the outer disk to rotate in the same direction through the transmission mechanism. Specifically, the transmission mechanism includes a driving wheel 31, a first-stage planetary wheel 32, a first-stage planetary carrier 33, a sun wheel 34, a second-stage planetary wheel 35, a second-stage planetary carrier 36, a gear ring cylinder 37, a connecting shaft 38 and a connecting cylinder 39. The driving wheel 31 is sleeved on the output shaft of the reducer. Two or three first-stage planetary wheels 32 are evenly spaced along the outer circumference of the driving wheel 31. Each first-stage planetary wheel 32 is arranged on the first-stage planetary carrier 33 through an axis and meshes with the driving wheel 31. The sun wheel 34 is located at the bottom of the first-stage planetary carrier 33 and meshes with the first-stage planetary wheels. The primary planetary carrier 32, the primary planetary carrier 33, the sun gear 34, the secondary planetary carrier 36, the secondary planetary carrier 36 is arranged at the bottom of the sun gear 34, two or three secondary planetary gears 35 are evenly spaced along the outer circumference of the sun gear 34, each secondary planetary gear 35 is arranged on the secondary planetary carrier 36 through an axis and meshes with the sun gear 34, the primary planetary gear 32, the primary planetary carrier 33, the sun gear 34, the secondary planetary gear 35, and the secondary planetary carrier 36 are arranged on the inner circumference of the gear ring cylinder 37, and at the same time, the primary planetary gear 32 and the secondary planetary gear 35 are meshed with the teeth on the inner wall of the gear ring cylinder 37. The upper end of the coupling shaft 38 is fixedly connected to the driving wheel 31, the lower end of the coupling shaft 38 is fixedly connected to the upper end of the inner shaft 310 through the coupling cylinder 39, and the upper end of the outer shaft 320 is fixedly connected to the secondary planetary carrier 36. When the motor is working, the motor outputs power through the output shaft of the reducer, and the output shaft drives the driving wheel 31 to rotate synchronously. On the one hand, the driving wheel 31 drives the inner shaft 310 to rotate through the connecting shaft 38 and the connecting cylinder 39, and on the other hand, the driving wheel 31 drives the outer shaft 320 to rotate through the primary planetary gear 32, the primary planetary carrier 33, the sun gear 34, the secondary planetary gear 35 and the secondary planetary carrier 36. The meshing between the driving wheel 31 and the primary planetary gear 32, and the meshing between the sun gear 34 and the secondary planetary gear 35 make the inner shaft 310 and the outer shaft 320 rotate in the same direction, thereby realizing the same-direction rotation of the inner disk body and the outer disk body.

[0060] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0061] Embodiment 3

[0062] In this embodiment, the outer disk is eliminated, and the transmission wheel is directly and detachably connected to the lower end of the outer shaft through threaded engagement. When the power mechanism drives the inner shaft and the outer shaft to rotate through the transmission mechanism, the rotating inner shaft drives the inner disk to rotate around its own central axis, the rotating inner disk drives the rotating heads to revolve, the rotating outer shaft drives the transmission wheel to rotate, and the transmission wheel drives the rotating heads to rotate by meshing with the pinion gear.

[0063] In this embodiment, the inner shaft and the outer shaft can rotate in the same direction or in opposite directions.

[0064] The other structures of the third embodiment are the same as those of the first embodiment and will not be described in detail here.

[0065] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A multi-head rotating device, comprising a power mechanism, a transmission mechanism and a working mechanism, wherein the transmission mechanism comprises an inner shaft and an outer shaft coaxially sleeved inside and outside, and the power mechanism drives the inner shaft and the outer shaft to rotate in the same direction or in the opposite direction, characterized in that: The working mechanism includes an inner disk body driven to rotate by an inner shaft and a transmission wheel driven to rotate by an outer shaft. The inner disk body is provided with a plurality of rotating heads distributed along the circumferential direction. The inner disk body rotating along with the inner shaft drives the rotating heads to revolve around the central axis of the inner disk body, and the transmission wheel rotating along with the outer shaft drives the revolving rotating heads to rotate around their own central axis at the same time.

2. The multi-head rotating device according to claim 1, characterized in that: The working mechanism also includes an outer disc body driven to rotate by the outer shaft, and the inner disc body is arranged on the inner periphery of the outer disc body.

3. The multi-head rotating device according to claim 2, characterized in that: The transmission wheel is fixed on the outer disc body.

4. The multi-head rotating device according to claim 2, characterized in that: The outer disc body is provided with a concave cavity which is formed upwardly from the lower surface and is used for accommodating the inner disc body, and the transmission wheel is arranged in the concave cavity.

5. The multi-head rotating device according to claim 1, characterized in that: Each of the rotating heads is provided with a pinion gear meshing with a transmission wheel. The transmission wheel rotating along with the outer shaft drives each rotating head to rotate around its own central axis through meshing with the pinion gear.

6. The multi-head rotating device according to claim 5, characterized in that: The rotating head comprises a shaft column and a rotating disc body arranged at the lower end of the shaft column. The pinion gear is sleeved on the shaft column and the pinion gear and the shaft column are arranged concentrically.

7. The multi-head rotating device according to claim 5, characterized in that: The inner disc body is provided with a shell body forming a receiving cavity, the pinion gear is arranged in the receiving cavity, and the shell body is provided with an avoidance notch for the pinion gear to mesh with the transmission wheel.

8. The multi-head rotating device according to claim 7, characterized in that: An axial limiting structure for limiting the axial position of the rotating head is provided between the rotating head and the shell.

9. An electric cleaning brush, including a housing, characterized in that: It also includes the multi-head rotating device as described in any one of claims 1 to 8, wherein the power mechanism and the transmission mechanism are arranged inside the casing, and the working mechanism is arranged outside the casing.

10. An electric tool, characterized in that: A multi-head rotating device comprising any one of claims 1 to 8.

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