Electric cleaning brush

Abstract

The utility model provides a kind of electric cleaning brush, comprising: main body;Including the brush head assembly of first brush head and second brush head;First connecting piece and second connecting piece, it is connected in the main body, first connecting piece is connected in first brush head, second connecting piece is connected in second brush head;Transmission shaft, the second connecting piece is connected in the transmission shaft;First gear and second gear, it is coaxially arranged with the transmission shaft, first gear is connected in the first connecting piece, second gear is connected in transmission shaft;First gear is configured to pass from the rotating motion of the drive component to first connecting piece, second gear is configured to pass from the rotating motion of drive component to the transmission shaft, so that transmission shaft drives the second connecting piece to rotate in the direction opposite to first connecting piece. First connecting piece and second connecting piece can drive first brush head and second brush head reverse rotation respectively, and the frictional force between the two and the force moment generated by surface to be cleaned at least one part is offset.

Description

Technical Field

[0001] This utility model relates to an electric cleaning brush, specifically an electric cleaning brush with two brush discs. Background Technology

[0002] Some existing electric cleaning brushes have a single brush head that rotates in one direction during operation. Users need to resist the friction between the brush head and the surface to be cleaned; otherwise, the brush head may shake or move, which is not conducive to the user's cleaning operation and may cause user fatigue during prolonged use. Utility Model Content

[0003] Therefore, this utility model provides an electric cleaning brush to solve the above problems.

[0004] To solve the above-mentioned technical problems, this utility model provides an electric cleaning brush, comprising: a main body, wherein a drive assembly is disposed within the main body; a brush head assembly, wherein the brush head assembly includes a first brush head and a second brush head; a first connector and a second connector, both of which are connected to the main body, the first connector being connected to the first brush head and the second connector being connected to the second brush head; a drive shaft, wherein the drive shaft is located within the main body and the second connector is connected to the drive shaft; a first gear and a second gear, wherein the first gear and the second gear are located within the main body and are coaxially arranged with the drive shaft. The first gear is connected to the first connector, and the second gear is connected to the drive shaft; wherein the first gear is configured to transmit rotational motion from the drive assembly to the first connector, and the second gear is configured to transmit rotational motion from the drive assembly to the drive shaft, such that the drive shaft drives the second connector to rotate in the opposite direction to the first connector; or the first gear is configured to transmit rotational motion from the second gear to the first connector, the second gear is configured to rotate with the drive shaft, and the second connector rotates with the drive shaft in the opposite direction to the first connector.

[0005] Optionally, it also includes a bracket fixed within the main body and a third gear rotatably connected to the bracket. The first gear, the second gear, and the third gear are all bevel gears, and the third gear meshes with the first gear and the second gear.

[0006] Optionally, the first end of the drive shaft is connected to the output end of the drive assembly, and the second connector is connected to the second end of the drive shaft.

[0007] Optionally, the third gear is connected to the output end of the drive assembly, and the third gear drives the first gear and the second gear to rotate in opposite directions.

[0008] Optionally, it also includes a gear connector. The first connector includes a body with a receiving cavity and a through hole at the bottom. The gear connector includes a first part and a second part that are connected to each other. The first gear is connected to the first part, and the second part passes through the through hole of the body and is connected to the body.

[0009] Optionally, one of the inner side of the through hole of the body and the outer side of the second part of the gear connector is provided with a protrusion, and the other of the inner side of the through hole of the body and the outer side of the second part of the gear connector is provided with a recess. The protrusion is engaged in the recess to allow the first connector to rotate with the gear connector.

[0010] Optionally, it also includes a retaining ring, the first part including an annular surface surrounding the second part, the side of the second part being provided with an annular groove, the retaining ring being received in the annular groove, the retaining ring abutting against the bottom of the receiving cavity of the first connector, the annular surface abutting against the bottom surface of the first connector opposite to the bottom of the receiving cavity, thereby restricting the axial movement of the gear connector relative to the first connector.

[0011] Optionally, the ratio of the number of teeth of the second gear to the number of teeth of the first gear is in the range of 1 / 2 to 2.

[0012] Optionally, the ratio of the operating speed of the second brush head to the operating speed of the first brush head is 1 / 2-2.

[0013] Optionally, the second gear is connected to the drive shaft by a key.

[0014] The present invention has the following advantages: the first connector can drive the first brush head to rotate in the first direction, and the second connector can drive the second brush head to rotate in the second direction. Since the torque generated by the friction between the two and the surface to be cleaned is at least partially canceled, the user can avoid unnecessary shaking or movement of the brush head assembly during operation without or with only a small amount of force. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a perspective view of an electric cleaning brush according to an embodiment of the present utility model.

[0017] Figure 2This is an exploded view of an electric cleaning brush according to an embodiment of the present invention, wherein some elements are omitted.

[0018] Figure 3 This is an exploded view from another angle of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0019] Figure 4 This is an exploded view of the electric cleaning brush according to an embodiment of the present invention, in which some elements are omitted.

[0020] Figure 5 This is an exploded view of the brush head of an electric cleaning brush according to an embodiment of the present invention.

[0021] Figure 6 This is an exploded view of the brush head of an electric cleaning brush according to an embodiment of the present invention from another angle.

[0022] Figure 7 for Figure 3 The exploded view of the assembly shown has the brush head and some components omitted.

[0023] Figure 8 This is a cross-sectional view of an electric cleaning brush according to an embodiment of the present invention, wherein some elements are omitted.

[0024] Figure 9 for Figure 7 Enlarged view of section A.

[0025] Figure 10 for Figure 7 Enlarged view of section B.

[0026] Figure 11 for Figure 8 Enlarged view of section C.

[0027] Figure 12 This is a cross-sectional view of an electric cleaning brush according to an embodiment of the present invention, wherein some elements are omitted.

[0028] Figure 13 for Figure 12 An enlarged view of part D in the image. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] refer to Figure 1-4 In one embodiment, an electric cleaning brush 100 includes a body 10 and a brush head assembly 20. The body 10 houses a drive assembly 11, and the brush head assembly 20 includes a first brush head 201 and a second brush head 202 (see...). Figure 6 ).

[0032] In one embodiment, the electric cleaning brush 100 further includes a first connector 31 and a second connector 32, both connected to the main body 10. The first connector 31 is connected to the first brush head 201, and the second connector 32 is connected to the second brush head 202. The electric cleaning brush 100 also includes a drive shaft 40, a first gear 51, and a second gear 52, all located within the main body 10. The second connector 32 is connected to the drive shaft 40. The first gear 51 and the second gear 52 are coaxially arranged with the drive shaft 40.

[0033] In one embodiment, the first gear 51 is connected to the first connecting member 31, and the second gear 52 is connected to the drive shaft 40. The first gear 51 is configured to transmit rotational motion from the drive assembly 11 to the first connecting member 31, and the second gear 52 is configured to transmit rotational motion from the drive assembly 11 to the drive shaft 40, such that the drive shaft 40 drives the second connecting member 32 to rotate in the opposite direction to the first connecting member 31. For example, both the first gear 51 and the second gear 52 are connected to a third gear (described in detail later). The third gear is connected to the drive assembly 11 and can transmit rotational motion from the drive assembly 11 to the first gear 51 and the second gear 52, enabling them to rotate in opposite directions.

[0034] In another embodiment, the first gear 51 is connected to the first connecting member 31, and the second gear 52 is connected to the drive shaft 40. The first gear 51 is configured to transmit rotational motion from the second gear 52 to the first connecting member 31, and the second gear 52 is configured to rotate with the drive shaft 40. The second connecting member 32 rotates with the drive shaft 40 in the opposite direction to the first connecting member 31. For example, the drive shaft 40 is connected to the drive assembly 11 and can rotate under the drive of the drive assembly 11. Both the first gear 51 and the second gear 52 are connected to a third gear (described in detail later). The second gear 52 can rotate with the drive shaft 40, and the rotation of the second gear 52 can drive the third gear to rotate. The third gear then drives the first gear 51 to rotate, and the rotation direction of the first gear 51 is opposite to the rotation direction of the second gear 52.

[0035] In another embodiment, the second gear 52 is connected to the first connecting member 31, and the first gear 51 is connected to the drive shaft 40. The first gear 51 is configured to rotate with the drive shaft 40, and the second gear 52 is configured to transmit the rotational motion from the first gear 51 to the first connecting member 31. The second connecting member 32 rotates with the drive shaft 40 in the opposite direction to the first connecting member 31. For example, the drive shaft 40 is connected to the drive assembly 11 and can rotate under the drive of the drive assembly 11. Both the first gear 51 and the second gear 52 are connected to a third gear (described in detail later). The first gear 51 can rotate with the drive shaft 40, and the rotation of the first gear 51 can drive the third gear to rotate. The third gear, in turn, drives the second gear 52 to rotate, and the rotation direction of the second gear 52 is opposite to the rotation direction of the first gear 51. The rotation of the second gear 52 can drive the first connecting member 31 to rotate.

[0036] With the above structure, the first connector 31 can drive the first brush head 201 to rotate in the first direction, and the second connector 32 can drive the second brush head 202 to rotate in the second direction. Since the torque generated by the friction between the two and the surface to be cleaned can be completely or mostly canceled, the user can avoid unnecessary shaking or movement of the brush head assembly 20 during operation without or with only a small amount of force.

[0037] The main body 10 can be a single unit or a modular structure. For example, in one embodiment, the main body 10 includes an elongated and hollow rod 101 and a head 102. The head 102 is connected to one end of the rod 101, and the connection can be a fixed connection (i.e., the head 102 is fixed relative to the rod 101) or a rotatable connection (i.e., the head 102 can rotate relative to the rod 101). The head 102 is generally a hollow cylinder, consisting of two interconnected half-shells. The rod 101 can also have a similar construction. Understandably, in other embodiments, the rod 101 and the head 102 can have other suitable constructions. A brush head assembly 20 is connected to the head 102. It should be noted that when the head 102 is fixed to the rod 101, the two can be arranged at an angle or coaxially extending along the same axis.

[0038] In one embodiment, the drive assembly 11 includes a motor for outputting rotational motion to the first connector 31 and the second connector 32. In another embodiment, the drive assembly 11 further includes a transmission assembly (not shown), a first output shaft (not shown), and a second output shaft 12 (see figure). Figure 7 and Figure 8The motor, transmission assembly, and first output shaft are disposed inside the rod portion 101, and the second output shaft 12 is disposed in the head portion 102. The input end of the transmission assembly is connected to the motor shaft of the motor, and the output end of the transmission assembly is connected to the first output shaft. Thus, the transmission assembly can transmit the rotational motion output by the motor to the first output shaft. When the head portion 102 is rotatably connected to the rod portion 101 or when the head portion 102 is fixed to the rod portion 101 but extends in different directions, the first output shaft and the second output shaft 12 are connected by a universal coupling (not shown). This ensures that even when the first output shaft and the second output shaft 12 extend along different axes, the rotational motion of the first output shaft can still be transmitted to the second output shaft 12 via the universal coupling. In this embodiment, the second output shaft 12 is the output end of the drive assembly 11. It is understood that in other embodiments, the drive assembly 11 can employ other types of conventional drive devices capable of outputting rotational motion, which will not be described further here.

[0039] refer to Figure 5 and Figure 6 In one embodiment, the first brush head 201 includes a first brush disc 21 and a first cleaning element 23, and the second brush head 202 includes a first brush disc 22 and a second cleaning element 24. In one embodiment, the second brush disc 22 is rotatably connected to the first brush disc 21, the first brush disc 21 having a cleaning element support portion 211 surrounding the second brush disc 22, and the first cleaning element 23 being connected to the cleaning element support portion 211. The second cleaning element 24 is connected to the second brush disc 22. The first brush disc 21 and the second brush disc 22 can rotate in different directions under the drive of the drive assembly 11. For example, during operation, the first brush disc 21 can rotate clockwise continuously, while the second brush disc 22 can rotate counterclockwise continuously. In another operating mode, the first brush disc 21 can be controlled to oscillate repeatedly within a certain angle range, that is, it first rotates clockwise by a certain angle, and then rotates counterclockwise by the same angle, and so on. The second brush disk 22 can also be controlled to swing repeatedly within a certain angle range. During this process, the rotation direction of the second brush disk 22 is always opposite to the rotation direction of the first brush disk 21.

[0040] In one embodiment, both the first brush disk 21 and the second brush disk 22 are generally flat discs. The front side of the first brush disk 21 (i.e., the surface facing the first cleaning member 23) is provided with a receiving cavity 212 that precisely accommodates the second brush disk 22, thereby forming an annular cleaning member support portion 211. Understandably, in other embodiments, the cleaning member support portion 211 does not necessarily need to surround the second brush disk 22 360 degrees; it can partially surround the second brush disk 22. For example, the cleaning member support portion 211 can surround the second brush disk 22 within a 180-degree range. After the second brush disk 22 is received in the receiving cavity 212, the front side of the second brush disk 22 (i.e., the surface facing the second cleaning member 24) and the front side of the cleaning member support portion 211 are flush, which allows the first cleaning member 23 connected to the front side of the cleaning member support portion 211 and the second cleaning member 24 connected to the front side of the second brush disk 22 to remain flush. Understandably, in another embodiment, the front of the second brush plate 22 is not flush with the front of the cleaning component carrier 211. Furthermore, the shapes of the first brush plate 21 and the second brush plate 22 are not limited to the aforementioned cases, and other suitable shapes can be selected as needed.

[0041] For example, both the first cleaning component 23 and the second cleaning component 24 include multiple sets of bristles 25, each set of bristles 25 comprising multiple filaments of the same length and diameter, which are tightly clustered together. In one embodiment, the front side of the cleaning component support portion 211 is provided with multiple evenly arranged receiving holes 213, and the front side of the second brush plate 22 is provided with multiple evenly arranged receiving holes 221. Each of the aforementioned receiving holes 213 / 221 is used to receive the root of a set of bristles 25. Each set of bristles 25 can be fixed in the receiving hole 213 / 221 by known connecting means. It is understood that the first cleaning component 23 and the second cleaning component 24 are not limited to being fixed in the receiving holes 213 / 221; they can be connected to the first brush plate 21 and the second brush plate 22 by hooking, magnetic attraction, or other means. It is understood that the construction of the first cleaning component 23 and the second cleaning component 24 is not limited thereto; for example, both the first cleaning component 23 and the second cleaning component 24 can be thin-sheet polishing cloths or scouring pads. The appropriate type of cleaning component can be selected according to actual needs. In this embodiment, the first brush plate 21 has a connection area connected to the first cleaning component 23, and the second brush plate 22 has a connection area connected to the second cleaning component 24. The area ratio of the connection area of ​​the first brush plate 21 to the connection area of ​​the second brush plate 22 is in the range of 1 / 3-3. It should be noted that in another embodiment, the first cleaning component 23 and the second cleaning component 24 can be made of different materials.

[0042] The contact area between the first cleaning component 23 and the surface to be cleaned can be calculated as follows: S = N * s, where S represents the contact area between the first cleaning component 23 and the surface to be cleaned, N represents the total number of receiving holes 213 with bristles on the first brush disk 21, and s represents the area of ​​each receiving hole 213. It should be noted that the receiving hole 213 includes a bottom surface, a circumferential surface, and an opening opposite the bottom surface; the aforementioned "area of ​​the receiving hole 213" refers to the area of ​​the opening of the receiving hole 213. The contact area between the second cleaning component 24 and the surface to be cleaned can be calculated in the same way, i.e., by multiplying the total number of receiving holes 221 on the second brush disk 22 by the area of ​​each receiving hole 221 (i.e., the opening of the receiving hole 221), the contact area between the second cleaning component 24 and the surface to be cleaned can be obtained.

[0043] In another embodiment, when both the first cleaning element 23 and the second cleaning element 24 can be thin-sheet polishing cloths or scouring pads, the first cleaning element 23 exactly covers the front side of the cleaning element support portion 211, and the second cleaning element 24 exactly covers the front side of the second brush plate 22. In this case, the contact area between the first cleaning element 23 and the surface to be cleaned is equal to the area of ​​the front side of the cleaning element support portion 211, and the contact area between the second cleaning element 24 and the surface to be cleaned is equal to the area of ​​the front side of the second brush plate 22. The ratio of the contact area between the first cleaning element 23 and the surface to be cleaned to the contact area between the second cleaning element 24 and the surface to be cleaned is in the range of 1 / 3 to 3. Accordingly, the ratio of the total number of receiving holes 213 provided on the first brush plate 21 to the total number of receiving holes 221 provided on the second brush plate 22 is in the range of 1 / 3 to 3. Understandably, in another embodiment, when both the first cleaning element 23 and the second cleaning element 24 can be thin-sheet polishing cloths or scouring pads, the first cleaning element 23 and the second cleaning element 24 can also be smaller than the front surface of the cleaning element support portion 211 and the front surface of the second brush plate 22, respectively. In this case, the contact area between the first cleaning element 23 and the surface to be cleaned is equal to the area of ​​the connection region of the first brush plate 21 connected to the first cleaning element 23, and the contact area between the second cleaning element 24 and the surface to be cleaned is equal to the area of ​​the connection region of the second brush plate 22 connected to the second cleaning element 24.

[0044] When the electric cleaning brush 100 is working, the first cleaning component 23 and the second cleaning component 24 contact the surface to be cleaned, and the first cleaning component 23 and the second cleaning component 24 rotate relative to each other on the surface to be cleaned. After conducting numerous experiments, the inventors of this utility model discovered that when the ratio of the contact area between the first cleaning component 23 and the surface to be cleaned to the contact area between the second cleaning component 24 and the surface to be cleaned is in the range of 1 / 3 to 3, even if the resistance torque generated by the friction between the first cleaning component 23 and the second cleaning component 24 and the surface to be cleaned is not completely offset, most of the aforementioned resistance torque can be offset. Therefore, in some embodiments, the aforementioned ratio is 1. In this case, the contact area between the first cleaning component 23 and the surface to be cleaned and the contact area between the second cleaning component 24 and the surface to be cleaned can be set to be equal. In this case, the total number of receiving holes 213 on the first brush plate 21 and the total number of receiving holes 221 on the second brush plate 22 are equal. Understandably, the ratio of the contact area between the first cleaning component 23 and the surface to be cleaned to the contact area between the second cleaning component 24 and the surface to be cleaned is not limited to this. The ratio can be selected according to actual needs, and in other embodiments it can be 0.5, 1.5, 2 and 2.5.

[0045] In one embodiment, the ratio of the operating speed of the second brush head 202 to the operating speed of the first brush head 201 is 1 / 2-2, that is, the ratio of the operating speed of the second brush disc 22 to the operating speed of the first brush disc 21 is in the range of 1 / 2-2. In one embodiment, in order to achieve approximately synchronous wear and tear and similar cleaning effects between the first and second cleaning components, the ratio of the operating speed of the second brush disc 22 to the operating speed of the first brush disc 21 can be set to 1:1.

[0046] In one embodiment, the brush head assembly 20 further includes a first bearing 26 disposed between the first brush disk 21 and the second brush disk 22, the balls of which are in contact with both the first brush disk 21 and the second brush disk 22. This configuration facilitates relative rotational movement between the first brush disk 21 and the second brush disk 22. In this embodiment, the first bearing 26 is a planar bearing. Specifically, the first bearing 26 is housed in a receiving cavity 212 of the first brush disk 21, and the balls of the first bearing 26 are in contact with the back surface of the second brush disk 22 and the bottom surface of the receiving cavity 212, respectively. It is understood that in another embodiment, the first bearing 26 may be a non-planar bearing.

[0047] In one embodiment, the brush head assembly 20 further includes a second bearing 27 and a brush head cover 28. The second bearing 27 and the brush head cover 28 are located on the side of the first brush disk 21 opposite to the second brush disk 22. The brush head cover 28 is connected to the second brush disk 22, and the second bearing 27 is located between the first brush disk 21 and the brush head cover 28. The balls of the second bearing 27 are in contact with the first brush disk 21 and the brush head cover 28. With this configuration, the second brush disk 22 can rotate relative to the first brush disk 21 following the brush head cover 28. In one embodiment, the second bearing 27 is a planar bearing. Specifically, a receiving cavity 214 is provided on the back side of the first brush disk 21 and the second brush disk 22. The second bearing 27 and the brush head cover 28 are both received in the receiving cavity 214, and the balls of the second bearing 27 are in contact with the inner surface of the brush head cover 28 and the bottom surface of the receiving cavity 214, respectively. It is understood that in another embodiment, the second bearing 27 can be a non-planar bearing.

[0048] In one embodiment, the electric cleaning brush 100 further includes a first connecting structure disposed on the second brush disc 22 and the brush head cover 28. The second brush disc 22 is connected to the brush head cover 28 via the first connecting structure, allowing it to rotate relative to the first brush disc 21 along with the brush head cover 28. In one embodiment, the first connecting structure includes a protrusion 222 disposed on the back surface of the second brush disc 22 and a groove 281 disposed on the inner surface of the brush head cover 28. The protrusion 222 has a non-circular cross-section (e.g., ...). Figure 6 The groove 281 (with a square cross-section) is shaped to correspond to the protrusion 222, such that when the protrusion 222 is received in the groove 281, it is restricted by the inner circumferential surface of the groove 281 and cannot rotate freely, thereby achieving synchronous rotation of the second brush disk 22 and the brush head cover 28. In this embodiment, the bottom of the receiving cavity 212 of the first brush disk 21 is provided with a through hole 215 for the protrusion 222 to pass through and communicating with the receiving cavity 214.

[0049] In one embodiment, the brush head assembly 20 is a separate component that can be detachably connected to the body 10. Thus, the brush head assembly 20 can be removed from the body 10 when needed. In one embodiment, the second connector 32 and the drive shaft 40 are integrally formed. Understandably, in another embodiment, the second connector 32 can be connected to the drive shaft 40 using existing known connection means (e.g., screws). In either case, the second connector 32 and the drive shaft 40 rotate about the same axis of rotation.

[0050] refer to Figure 7 and Figure 9In one embodiment, the electric cleaning brush 100 further includes a bracket 54 fixed within the main body 10 (specifically the head 103) and a third gear 53 rotatably connected to the bracket 54. The first gear 51, second gear 52, and third gear 53 are all bevel gears, and the third gear 53 meshes with the first gear 51 and the second gear 52. In this embodiment, the bracket 54 includes a body 541 and sidewalls 542 and 543, which are connected to opposite ends of the bracket 54 and extend from both ends of the bracket in the same direction. It should be noted that the bracket 54 and the main body 10 can be integral or, as in this embodiment, separate components.

[0051] In one embodiment, a third gear 53 is rotatably connected to the body 541 and is located between the sidewalls 542 and 543. Specifically, the body 541 is provided with a through hole 5411, which allows a shaft 5412 (see...) Figure 7 The shaft 5412 can rotate freely relative to the through hole 5411. One end of the shaft 5412 is connected to a head 5413 (see...). Figure 7 The diameter of the head 5413 is larger than the diameter of the shaft 5412. The third gear 53 has a receiving hole 531 into which the other end of the shaft 5412 is inserted. The receiving hole 531 is non-circular, and the other end of the shaft 5412 has a correspondingly non-circular cross-section. Through this fit, the third gear 53 can rotate synchronously with the shaft 5412. In one embodiment, the third gear 53 can be fixed to the shaft 5412 by a known connecting means (e.g., screws). In one embodiment, a bearing 55 is provided between the third gear 53 and the body 541. This bearing 55 is a planar bearing, and its balls contact the back of the third gear 53 and the body 541, respectively. With this configuration, the third gear 53 can rotate freely relative to the body 541, following the shaft 5412. Furthermore, the head 5413 is located on the outer side of the body 541 away from the sidewalls 542 and 543, and the third gear 53 and bearing 55 are located on the inner side of the body 541 away from the outer side. With this structure, the shaft 5412 can rotate freely relative to the body 541, but cannot detach from the body 541.

[0052] In one embodiment, the first end of the drive shaft 40 is connected to the output end of the drive assembly 11 (i.e., the second output shaft 12), and the second connector 32 is connected to the second end of the drive shaft 40 opposite to the first end. In this embodiment, the sidewall 542 is provided with a through hole 5421, which provides access for the output connector 56 (see...). Figure 8In this embodiment, the output connector 56 includes a first portion 561 and a second portion 562 connected to each other. The first portion 561 is rotatably received in a through hole 5421 in the sidewall 542, and the end face of the first portion 561 facing away from the second portion 562 is provided with a receiving hole for receiving a portion of the second output shaft 12. The second output shaft 12 can be connected to the first portion 561 of the output connector 56 by a known connection means (e.g., a threaded connection), so that the output connector 56 can rotate synchronously with the second output shaft 12, and both rotate about the same axis of rotation.

[0053] In one embodiment, the first end of the drive shaft 40 is provided with a receiving hole for accommodating the second portion 562 of the output connector 56. The drive shaft 40 can be connected to the second portion 562 of the output connector 56 by a known connection means (e.g., a threaded connection), so that the drive shaft 40 can rotate synchronously with the second portion 562 of the output connector 56, and both rotate about the same axis of rotation. Furthermore, the drive shaft 40 can rotate synchronously with the second output shaft 12, and both rotate about the same axis of rotation. It is understood that in another embodiment, the output connector 56 can be integrally formed with the drive shaft 40. In yet another embodiment, the output connector 56 can be integrally formed with the second output shaft 12.

[0054] Also refer to Figure 9 In one embodiment, the second gear 52 is fitted onto the drive shaft 40 and connected to the drive shaft 40 via a key 401. Specifically, the inner surface of the through hole 521 through which the drive shaft 40 passes is provided with a groove 522, and the circumferential surface of the drive shaft 40 is provided with a receiving groove (not shown). The key 401 is partially received in the receiving groove and partially received in the groove 522. With this configuration, the second gear 52 is fitted onto the drive shaft 40, allowing the second gear 52 to rotate synchronously with the drive shaft 40, and both rotate around the same axis of rotation. It is understood that in another embodiment, the second gear 52 can be connected to the drive shaft 40 by other known connection means.

[0055] In one embodiment, a bearing 57 is also fitted onto the drive shaft 40. This bearing 57 is a planar bearing, and its balls contact one end of the second gear 52 and the sidewall 542, respectively. Furthermore, the other end of the second gear 52 abuts against a shoulder on the drive shaft 40. With this configuration, the second gear 52 is restricted by the bearing 57 and the shoulder, preventing it from moving relative to the drive shaft 40 along its length.

[0056] In one embodiment, the sidewall 543 is provided with a through hole 5431. The first gear 51 includes a gear body 511 with teeth and a hollow cylindrical body 512 connected to the gear body 511 (both are shown in the figure). Figure 8 and Figure 9 The gear body 511 has a through hole communicating with the cylinder 512, allowing the first gear 51 to be rotatably mounted on the drive shaft 40, i.e., the drive shaft 40 passes through the gear body 511 and the cylinder 512 in sequence. Both the drive shaft 40 and the cylinder 512 pass through the through hole 5431 of the side wall 543. One end of the gear body 511 connected to the cylinder 512 abuts against the surface of the side wall 543 facing the side wall 542, and the gear body 511 meshes with the third gear. With this structure, the first gear 51 can rotate freely relative to the drive shaft 40, but cannot extend along the length of the drive shaft 40.

[0057] Also refer to Figure 10 In one embodiment, the electric cleaning brush 100 further includes a gear connector 58. The first connector 31 includes a body 311, which has a receiving cavity 312. The bottom of the receiving cavity 312 has a through hole 3121. The gear connector 58 includes a first part 581 and a second part 582 connected to each other. The first gear 51 is connected to the first part 581, and the second part 582 passes through the through hole 312 of the body 311 of the first connector 31 and is connected to the body 311.

[0058] In one embodiment, both the first portion 581 and the second portion 582 of the gear connector 58 are cylindrical, with the diameter of the second portion 582 being smaller than the diameter of the first portion 581. A receiving hole is provided on the end face of the first portion 581 facing the first gear 51. A portion of the cylindrical body 512 of the first gear 51, passing through a through hole 5431 in the sidewall 543, extends into the receiving hole of the first portion 581 and is connected to the gear connector 58 by a known connection means (e.g., a threaded connection). With this configuration, the gear connector 58 can rotate synchronously with the first gear 51, and both rotate about the same axis of rotation.

[0059] In one embodiment, a protrusion is provided on one of the inner side of the through hole 3121 of the body 311 of the first connector 31 and the outer side of the second portion 582 of the gear connector 58, and a recess is provided on the other side of the inner side of the through hole 3121 of the body 311 of the first connector 31 and the outer side of the second portion 582 of the gear connector 58. The protrusion is engaged in the recess to allow the first connector 31 to rotate with the gear connector 58. Figure 10In the illustrated embodiment, the inner side of the through hole 3121 of the body 311 of the first connector 31 is provided with a protrusion 3122, and the outer side of the second part 582 of the gear connector 58 is provided with a recess 5821. With the above-described structure, the gear connector 58 transmits the rotational motion of the first gear 51 to the first connector 31, and both the first connector 31 and the gear connector 58 rotate about the same axis.

[0060] In one embodiment, the electric cleaning brush 100 also includes a retaining ring 59 (see...). Figure 11 The first portion 581 of the gear connector 58 includes an annular surface 5811 surrounding the second portion 582 (see...). Figure 10 The second part 582 has a circumferentially extending annular groove 5822 on its circumferential side. The retaining ring is received in the annular groove 5822, and the retaining ring abuts against the bottom of the receiving cavity 312 of the first connector 31. The annular surface 5811 abuts against the bottom surface of the first connector 31 opposite to the bottom of the receiving cavity 312, thereby restricting the axial movement of the gear connector 58 relative to the first connector 31. With this structure, the first connector 31 can only rotate with the gear connector 58, and there is no relative movement between the two.

[0061] Also refer to Figure 8 and Figure 10 In one embodiment, the second part 582 of the gear connector 58 is provided with a receiving cavity 5823 on the end face opposite to the first part 581. The bottom of the receiving cavity 5823 is provided with a through hole 5824, which communicates with the receiving hole of the first part 581 of the gear connector 58 that receives a part of the first gear 51. Thus, the drive shaft 40 passes through the receiving hole and the through hole 5824 of the first part 581 and is partially received in the receiving cavity 5823 of the first part 581 and partially received in the receiving cavity 312 of the first connector 31.

[0062] In one embodiment, the second connector 32 is received within the receiving cavity 312 of the first connector 31, and the second connector 32 is generally cylindrical. In one embodiment, the electric cleaning brush 100 further includes a second connecting structure disposed on the second connector 32 and the second brush head 202, the second connecting structure detachably connecting the second brush head to the second connector 32. In one embodiment, since the brush head cover 28 is connected to the second connector 32, the brush head cover 28 can also be considered as part of the second brush head. The second connecting structure includes a protrusion 282 disposed on the outer end face of the brush head cover 28 (see...). Figure 6The protrusion 282 has a non-circular cross-section, and the shape of the groove 321 is correspondingly provided for the protrusion 282, so that the protrusion 282 is restricted by the inner wall of the groove 321 and cannot rotate relative to the groove 321, thereby realizing that the second brush head rotates synchronously with the second connector 32. In one embodiment, the protrusion 282 of the brush head cover 28 is provided with a through hole for a fastener such as a screw to pass through. The fastener passes through the through hole and is screwed into the second brush disk 22, thereby fixing the second brush disk 22 and the brush head cover 28 together. With this structure, the first brush disk 21 is rotatably clamped between the second brush disk 22 and the brush head cover 28, and the first brush disk 21, the second brush disk 22 and the brush head cover 28 are formed into a single unit.

[0063] Also refer to Figure 6 , Figure 10 , Figure 12 and Figure 13 In one embodiment, the electric cleaning brush 100 further includes a locking member and a locking member mating part. Specifically, in one embodiment, the locking member includes a button 313 slidably connected to the body 311 of the first connector 31 and a hook 314 connected to the button. The locking member mating part is a hook mating part 216 provided on the first brush head. When the locking member is in the locked position, the hook 314 and the hook mating part 216 cooperate to detachably connect the first brush head to the first connector 31. Specifically, the hook mating part 216 is located on the end face of the back of the first brush disc 21 where the receiving cavity 214 is formed. The hook mating part 216 can be in the shape of a protrusion, which is provided with a recess into which the end of the hook 314 extends. It is understood that in another embodiment, the button 313 can also be rotatably connected to the button 313.

[0064] In one embodiment, the body 311 of the first connector 31 includes an inner wall 315 forming the receiving cavity 312 and an outer wall 316 surrounding the inner wall 315. The outer wall 316 and the inner wall 315 are spaced apart by a certain distance to form a space 317 surrounding the inner wall 315. The first connector 31 also includes a cover 318 covering the open end of the outer wall 316. The cover 318 is provided with a through hole 3181 for the hook engagement part 216 to pass through and a through hole 3182 for the second connector 32 to be exposed. The outer wall 316 of the first connector 31 is provided with a through hole 3161 for the button 313 to pass through.

[0065] In one embodiment, the electric cleaning brush 100 further includes an elastic member 60 disposed between the body 311 and the button 313. The elastic member 60 is located in the space 317 and applies a force to the button 313 to maintain the engagement of the hook 314 and the hook engagement portion 216. That is, both ends of the elastic member 60 abut against the inner wall 315 and the button 313 respectively, and the elastic member 60 applies a pushing force to the hook 314, causing the end of the hook 314 to be tightly engaged in the recess of the hook engagement portion 216, thereby connecting the first brush plate 21 to the first connecting member 31. When needed, the user can press the button 313 to move it towards the inner wall 315, causing the hook 314 to finally disengage from the hook engagement portion 216. At this time, there is no longer any restriction between the first connecting member 31 and the first brush plate 21, and the user can remove the brush head assembly 20 from the body 10.

[0066] As previously described, the first end of the drive shaft 40 is connected to the output end of the drive assembly 11 (i.e., the second output shaft 12). The second output shaft 12 can drive the drive shaft 40 to rotate, which in turn drives the second gear 52 and the second connecting member 32 to rotate. The rotation of the second gear 52 will drive the third gear 53 meshing with it to rotate, and the rotation of the third gear 53 will in turn drive the first gear 51 meshing with it to rotate, with the rotation direction of the first gear 51 being opposite to that of the second gear 52. The rotation of the first gear 51 will drive the first connecting member 31 to rotate. Thus, the first connecting member 31 and the second connecting member 32 can rotate in opposite directions around the same axis of rotation (i.e., the axis of rotation around which the drive shaft 40 rotates), thereby enabling the first brush head 201 and the second brush head 202 to rotate in opposite directions.

[0067] Understandably, in another embodiment, the output end of the drive assembly 11 (i.e., the second output shaft 12) is connected to the third gear 53. In this case, the third gear 53 can drive the first gear 51 and the second gear 52 to rotate in opposite directions. The rotation of the second gear 52 can drive the transmission shaft 40 to rotate, and the transmission shaft 40 in turn drives the second connecting member 32 to rotate. The rotation of the first gear 51 will drive the first connecting member 31 to rotate. Thus, the first connecting member 31 and the second connecting member 32 can rotate in opposite directions about the same axis of rotation (i.e., the axis of rotation around which the transmission shaft 40 rotates), thereby enabling the first brush head 201 and the second brush head 202 to rotate in opposite directions.

[0068] As mentioned earlier, the ratio of the operating speed of the second brush disk 22 to that of the first brush disk 21 is in the range of 1 / 2 to 2, and the operating speed of the second brush disk 22 is equal to the speed of the second gear 52, while the operating speed of the first brush disk 21 is equal to the speed of the first gear 51. To achieve this ratio of 1 / 2 to 2, the ratio of the number of teeth on the second gear to the number of teeth on the first gear is also in the range of 1 / 2 to 2.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. An electric cleaning brush, characterized in that, include: The main body, which contains the driving components; A brush head assembly, comprising a first brush head and a second brush head; A first connector and a second connector are both connected to the main body. The first connector is connected to the first brush head, and the second connector is connected to the second brush head. A drive shaft located within the main body, and the second connector connected to the drive shaft; A first gear and a second gear are located inside the main body and are coaxially arranged with the drive shaft. The first gear is connected to the first connector and the second gear is connected to the drive shaft. The first gear is configured to transmit rotational motion from the drive assembly to the first connector, and the second gear is configured to transmit rotational motion from the drive assembly to the drive shaft, causing the drive shaft to drive the second connector to rotate in the opposite direction to the first connector; or The first gear is configured to transmit rotational motion from the second gear to the first connector, the second gear is configured to rotate with the drive shaft, and the second connector rotates with the drive shaft in the opposite direction to the first connector.

2. The electric cleaning brush according to claim 1, characterized in that, It also includes a bracket fixed within the main body and a third gear rotatably connected to the bracket. The first gear, the second gear, and the third gear are all bevel gears, and the third gear meshes with the first gear and the second gear.

3. The electric cleaning brush according to claim 2, characterized in that, The first end of the drive shaft is connected to the output end of the drive assembly, and the second connector is connected to the second end of the drive shaft.

4. The electric cleaning brush according to claim 2, characterized in that, The third gear is connected to the output end of the drive assembly, and the third gear drives the first gear and the second gear to rotate in opposite directions.

5. The electric cleaning brush according to claim 1, characterized in that, It also includes a gear connector. The first connector includes a body with a receiving cavity and a through hole at the bottom. The gear connector includes a first part and a second part that are connected to each other. The first gear is connected to the first part, and the second part passes through the through hole of the body and is connected to the body.

6. The electric cleaning brush according to claim 5, characterized in that, One of the inner side of the through hole of the body and the outer side of the second part of the gear connector is provided with a protrusion, and the other of the inner side of the through hole of the body and the outer side of the second part of the gear connector is provided with a recess. The protrusion is engaged in the recess to allow the first connector to rotate with the gear connector.

7. The electric cleaning brush according to claim 5, characterized in that, It also includes a retaining ring. The first part includes an annular surface surrounding the second part. The side of the second part is provided with an annular groove. The retaining ring is received in the annular groove. The retaining ring abuts against the bottom of the receiving cavity of the first connector. The annular surface abuts against the bottom surface of the first connector opposite to the bottom of the receiving cavity, thereby restricting the axial movement of the gear connector relative to the first connector.

8. The electric cleaning brush according to claim 2, characterized in that, The ratio of the number of teeth of the second gear to the number of teeth of the first gear is in the range of 1 / 2 to 2.

9. The electric cleaning brush according to claim 1, characterized in that, The ratio of the operating speed of the second brush head to that of the first brush head is 1 / 2 - 2.

10. The electric cleaning brush according to claim 1, characterized in that, The second gear is connected to the drive shaft by a key.

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