Transmission mechanism and cleaning equipment

Abstract

The utility model is suitable for the technical field of cleaning equipment, and provides a transmission mechanism and cleaning equipment, the transmission mechanism comprises a shell, a driving structure, an output structure and a transmission assembly, and the output structure is used for being connected with a cleaning element; the transmission assembly comprises a plurality of gear structures which are sequentially meshed, one gear structure is in transmission connection with the output structure, the other gear structure is in transmission connection with the driving structure, and the driving structure drives the output structure to move through the transmission assembly. The shell is provided with a containing cavity, the multiple gear structures are all installed in the containing cavity, an oil blocking structure is arranged in the containing cavity, and the oil blocking structure is arranged on the peripheral partial area of each gear structure in a surrounding mode. According to the transmission mechanism, the lubricating time of the gear structure can be prolonged, and the use stability of the cleaning equipment with the transmission mechanism is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and more specifically, to a transmission mechanism and a cleaning equipment. Background Art

[0002] With the development of technology, various cleaning equipment have emerged, which can complete the cleaning work and save the user's time.

[0003] The cleaning device includes a driving component, a transmission component and a cleaning component. The driving component drives the cleaning component to perform a cleaning operation through the transmission component. The transmission component includes a plurality of gears. As the gears are used for a longer time, the wear of the gears increases, thereby affecting the stability of the cleaning device. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a transmission mechanism and a cleaning device, aiming to solve the technical problem of relatively poor use stability of the cleaning device in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a transmission mechanism is provided for a cleaning device, the transmission mechanism comprising: a housing, a driving structure, an output structure and a transmission assembly, the output structure being used to connect a cleaning element;

[0007] The transmission assembly includes a plurality of gear structures, which are meshed in sequence, wherein one gear structure is transmission-connected to the output structure, and another gear structure is transmission-connected to the drive structure, and the drive structure drives the output structure to move through the transmission assembly;

[0008] The housing has a receiving cavity, and a plurality of gear structures are installed in the receiving cavity. An oil retaining structure is arranged in the receiving cavity, and the oil retaining structure surrounds a partial area of ​​the periphery of at least a portion of the gear structure.

[0009] In a feasible embodiment, the housing includes a first shell and a second shell, the first shell is installed on one side of the second shell in a first direction, and the first direction is parallel to the axial direction of the gear structure; the first shell and the second shell are arranged to form a accommodating cavity, and at least one of the first shell and the second shell is provided with an oil retaining structure.

[0010] In a feasible embodiment, the first shell is provided with a first surrounding wall, and the second shell is provided with a second surrounding wall. Both the first surrounding wall and the second surrounding wall are closed annular structures. One of the first surrounding wall and the second surrounding wall is provided with an annular groove, and the other is provided with an annular protrusion. The annular protrusion is located in the annular groove, and the first surrounding wall and the second surrounding wall are arranged to form a accommodating cavity.

[0011] In a feasible embodiment, multiple gear structures include a first gear structure, a second gear structure, a third gear structure, a fourth gear structure and a fifth gear structure. The first gear structure is transmission-connected to the driving structure, the fifth gear structure is transmission-connected to the output structure, the second gear structure includes a second upper gear portion and a second lower gear portion coaxially connected in a first direction, the third gear structure includes a third upper gear portion and a third lower gear portion coaxially connected in the first direction, the fourth gear structure includes a fourth upper gear portion and a fourth lower gear portion coaxially connected in the first direction, the first gear structure is meshed with the second lower gear portion, the second upper gear portion is meshed with the third upper gear portion, the third lower gear portion is meshed with the fourth lower gear portion, and the fourth upper gear portion is meshed with the fifth gear structure.

[0012] In a feasible implementation manner, there is a first gap between the third upper gear and the third lower gear, a portion of the second lower gear portion is located in the first gap, and a portion of the fourth upper gear portion is located in the first gap.

[0013] In a feasible embodiment, the first shell has a first zone and a second zone, the first zone is arranged opposite to the first gear structure, the second gear structure and the third gear structure, the second zone is arranged opposite to the fourth gear structure and the fifth gear structure, and there is a height difference between the wall surface of the first zone away from the accommodating cavity and the wall surface of the second zone away from the accommodating cavity.

[0014] In a possible implementation manner, the first gear structure and the second lower gear portion both include helical gears.

[0015] In a feasible implementation manner, the first shell and the second shell are respectively provided with reinforcing ribs, and the reinforcing ribs are connected to the oil retaining structure.

[0016] In a possible implementation, the driving structure includes a brushless motor.

[0017] In a second aspect, a cleaning device is provided, comprising a cleaning element and a transmission mechanism as provided by any of the above technical solutions, wherein the cleaning element is mounted on an output structure of the transmission mechanism.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the transmission mechanism provided in the embodiment of the present application, the transmission assembly is used to transmit the driving force provided by the driving structure to the output structure. The transmission assembly includes a plurality of gear structures, and the plurality of gear structures are installed in the accommodating cavity of the housing. Since an oil retaining structure is provided in the accommodating cavity, the oil retaining structure is arranged around a part of the outer area of ​​the gear structure. During the operation of the transmission mechanism, at least part of the lubricating grease thrown out due to the centrifugal force generated during the rotation of the gear structure is thrown to the side of the oil retaining structure facing the gear structure. On the one hand, the oil retaining structure reduces the amount of lubricating grease thrown out at a relatively long distance relative to the gear structure; on the other hand, as the lubricating grease accumulates on the oil retaining structure, the thickness of the lubricating grease layer on the oil retaining structure increases, and the distance between the oil retaining structure and the gear structure decreases. The gear structure contacts the accumulated lubricating grease on the oil retaining structure during the rotation process, thereby improving the lubrication effect of the gear structure. As can be seen from the above, the transmission mechanism provided in the embodiment of the present application can extend the lubrication time for the gear structure, improve the lubrication effect of the gear structure after a relatively long period of operation, and improve the use stability of the cleaning equipment using the transmission mechanism.

[0020] The cleaning device provided in the embodiment of the present application includes the above-mentioned transmission mechanism, so the cleaning device at least includes all the beneficial effects of the above-mentioned transmission mechanism, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the appearance of a transmission mechanism provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of assembling the transmission assembly, the drive structure and the output structure on the second housing provided in an embodiment of the present application;

[0024] Figure 3 is a bottom view of the transmission mechanism provided in an embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of a second housing provided in an embodiment of the present application;

[0026] Figure 5 is a top view of the second housing provided in an embodiment of the present application;

[0027] Figure 6 is a bottom view of the first shell provided in an embodiment of the present application;

[0028] Figure 7 It is an assembly diagram of a transmission assembly, a drive structure and an output structure provided in an embodiment of the present application;

[0029] Figure 8 is a side view of a transmission assembly provided in an embodiment of the present application;

[0030] Fig. 9 is a side view of a first housing provided in an embodiment of the present application;

[0031] Fig.10 is an exploded diagram of the output structure provided in an embodiment of the present application;

[0032] Fig.11 It is an exploded view of the transmission mechanism provided in the embodiment of the present application.

[0033] The reference numerals in the above drawings are as follows:

[0034] 100, housing; 110, oil retaining structure; 120, first housing; 121, first surrounding wall; 122, annular protrusion; 123, reinforcing rib; 124, first zone; 125, second zone; 130, second housing; 131, second surrounding wall; 132, annular groove; 133, vibration isolation structure; 134, first through hole; 135, first opening; 140, second self-tapping screw; 200, driving structure; 210, machine screw; 300, output structure; 310, first self-tapping screw; 320, retaining frame; 330, elastic member; 340, mounting Accessories; 350, moving parts; 360, matching parts; 400, transmission assembly; 410, first gear structure; 420, second gear structure; 421, second upper gear part; 422, second lower gear part; 430, third gear structure; 431, third upper gear part; 432, third lower gear part; 433, first gap; 440, fourth gear structure; 441, fourth upper gear part; 442, fourth lower gear part; 450, fifth gear structure; 461, first bearing; 462, second bearing; 470, roller; 500, sensor. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] The embodiments of the present application provide a transmission mechanism and a cleaning device. The transmission mechanism is applied to the cleaning device. The cleaning device may be a floor scrubber, a sweeping robot, a sweeping and mopping robot, etc., and the embodiments of the present application do not limit this.

[0041] Figure 1 This is a schematic diagram of the appearance of the transmission mechanism provided in the embodiment of the present application. Figure 2 This is a schematic diagram of the assembly of the transmission assembly, the drive structure and the output structure provided in the embodiment of the present application on the second housing. Figure 1 and Figure 2As shown, the transmission mechanism includes a housing 100, a driving structure 200, an output structure 300 and a transmission assembly 400, wherein the output structure 300 is used to connect a cleaning element, and the cleaning element is used to perform a cleaning operation, and the cleaning element may be a brush body, a mop or other structures. The driving structure 200 is used to provide a driving force, and the transmission assembly 400 is used to transmit the driving force of the driving structure 200 to the output structure 300, so as to drive the cleaning element to move through the output structure 300, thereby achieving a cleaning operation. Exemplarily, the output structure 300 can be used to drive the cleaning element to rotate or move. In a specific example, the output structure 300 can drive the cleaning element to rotate, and the output structure 300 can drive the cleaning element to move in a first direction. The first direction is parallel to the axial direction of the gear structure. In this embodiment, the transmission mechanism is further explained by taking the first direction as a vertical direction (up and down direction) as an example.

[0042] The housing 100 has a receiving cavity, and the transmission assembly 400 is installed in the receiving cavity. In one example, the drive structure 200 can also be installed in the receiving cavity. In another example, the drive structure 200 can be installed outside the receiving cavity, and the output shaft of the drive structure 200 extends into the receiving cavity to be connected to the transmission assembly 400.

[0043] In one example, the output structure 300 may be installed in the accommodating cavity, and one end of the cleaning element extends into the accommodating cavity to connect with the output structure 300. In another example, the output structure 300 may be installed in the accommodating cavity, and a portion of the output structure 300 extends out of the accommodating cavity to connect with the cleaning element. In yet another example, the output structure 300 is installed outside the accommodating cavity, and a portion of the output structure 300 extends into the accommodating cavity to be transmission-connected with the transmission assembly 400.

[0044] In a specific embodiment, the transmission assembly 400 is installed in the accommodating cavity, the driving structure 200 is installed outside the accommodating cavity, and the driving structure 200 is connected to the housing 100, and the output shaft of the driving structure 200 extends into the accommodating cavity to be transmission-connected with the transmission assembly 400. The output structure 300 is installed outside the accommodating cavity, and the output structure 300 is connected to the housing 100, and a part of the output structure 300 extends into the accommodating cavity to be transmission-connected with the transmission assembly 400.

[0045] The connection between the drive structure 200 and the housing 100 can be connected by welding, screw connection, bonding or snap connection. The connection between the output structure 300 and the housing 100 can be connected by welding, welding, screw connection, bonding or snap connection. In one example, the drive structure 200 and the housing 100, and the output structure 300 and the housing 100 are connected by screws. Using screws to connect the drive structure 200 and the housing 100, and the output structure 300 and the housing 100 can simplify the installation process and improve assembly efficiency. In a specific example, Figure 2 As shown, the driving structure 200 is connected to the housing 100 by a plurality of machine screws 210. Figure 3 As shown, the output structure 300 is connected to the housing 100 by a plurality of first self-tapping screws 310. The pitch of the machine screws 210 is relatively small, so that the machine screws 210 can withstand large tensile and shear forces, thereby improving the connection stability and durability between the drive structure 200 and the housing 100. The self-tapping screws do not require prefabrication of the threads at the installation position, thus simplifying the installation process and improving the assembly efficiency between the output structure 300 and the housing 100.

[0046] The transmission assembly 400 includes a plurality of gear structures, which are meshed in sequence. The transmission assembly 400 includes at least two gear structures, one of which is in transmission connection with the output structure 300, and the other gear structure is in transmission connection with the driving structure 200. The transmission assembly 400 may also include three or more gear structures. When the number of gear structures included in the transmission assembly 400 is greater than two, the plurality of gear structures are meshed in sequence, and one of the two gear structures located at both ends of the plurality of gear structures is in transmission connection with the output structure 300, and the other gear structure is in transmission connection with the driving structure 200.

[0047] The housing 100 has a receiving cavity, and a plurality of gear structures are installed in the receiving cavity. An oil retaining structure 110 is arranged in the receiving cavity, and the oil retaining structure 110 is arranged around a peripheral area of ​​at least some of the gear structures. Since there are a plurality of gear structures, the oil retaining structure 110 may be arranged in a peripheral area of ​​one of the gear structures. Alternatively, the oil retaining structure 110 may be arranged in a peripheral area of ​​several of the gear structures. Alternatively, the oil retaining structure 110 may be arranged in a peripheral area of ​​all the gear structures.

[0048] The oil retaining structure 110 is arranged in a partial area of ​​the periphery of the gear structure. Since adjacent gear structures are meshed, the oil retaining structure 110 is not arranged in the periphery of the area where the gear structure is used to mesh with another or more gears, but is arranged in the periphery of the non-meshing area of ​​the gear structure.

[0049] The oil-blocking structure 110 is arranged adjacent to the gear structure, and there is a certain gap between the oil-blocking structure 110 and the gear structure, that is, the oil-blocking structure 110 does not contact the gear structure. Exemplarily, the gap between the oil-blocking structure 110 and the gear structure may be 0.5mm-1mm. The oil-blocking structure 110 may be a partial area of ​​the inner wall of the accommodating cavity adjacent to the gear structure, or the oil-blocking structure 110 may be a plate-like structure arranged in the accommodating cavity. When the setting position of the gear structure is adjacent to the inner wall of the accommodating cavity, the partial area of ​​the inner wall of the accommodating cavity adjacent to the gear structure may be set as the oil-blocking structure 110. When the setting position of the gear structure is far away from the inner wall of the accommodating cavity, a plate-like oil-blocking structure 110 may be arranged in the accommodating cavity so that the oil-blocking structure 110 can be arranged adjacent to the gear structure. In the case where the oil-blocking structure 110 includes a partial area of ​​the inner wall of the accommodating cavity, the space occupied by the oil-blocking structure 110 can be saved, and the utilization rate of the accommodating cavity can be improved. When the oil retaining structure 110 includes a plate-like structure disposed in the accommodating cavity, the plate-like structure plays a role in reinforcing the structural strength in the accommodating cavity, thereby improving the structural strength of the housing 100 .

[0050] In the embodiment of the present application, since an oil retaining structure 110 is provided, during the rotation of the gear structure, since the oil retaining structure 110 is arranged around a partial area outside the gear structure, part of the lubricating grease is thrown to the side of the oil retaining structure 110 facing the gear structure due to the centrifugal force generated during the rotation of the gear structure, thereby reducing the amount of lubricating grease thrown to the area away from the gear structure. As the lubricating grease accumulates on the oil retaining structure 110, the gear structure comes into contact with the lubricating grease on the oil retaining structure 110 during the rotation, and scrapes the lubricating grease off the oil retaining structure 110, thereby allowing the lubricating grease to return to the tooth surface of the gear structure to increase the lubrication effect of the gear structure.

[0051] To facilitate the installation of the transmission assembly 400 in the accommodating cavity, illustratively, the housing 100 can be formed by connecting multiple parts. For example, the housing 100 can be formed by connecting two parts, or can be connected by three parts or more parts. The multiple parts are together arranged to form the accommodating cavity.

[0052] like Figures 4 to 6 As shown, in a specific example, the housing 100 includes at least two structures, namely a first shell 120 and a second shell 130. In some embodiments, the housing 100 includes a first shell 120 and a second shell 130. The first shell 120 is installed on one side of the second shell 130 in a first direction, and the first direction is parallel to the axial direction of the gear structure; the first shell 120 and the second shell 130 are surrounded to form a accommodating cavity, and at least one of the first shell 120 and the second shell 130 is provided with an oil retaining structure 110.

[0053] The first shell 120 and the second shell 130 are fixedly connected and enclosed together to form a receiving cavity. In this arrangement, the transmission assembly 400 can be first installed in at least one of the first shell 120 and the second shell 130, and then the other is connected to the former and enclosed to form the receiving cavity, so that the transmission assembly 400 is located in the receiving cavity. In this arrangement, the operation space is relatively larger during the connection process between the transmission assembly 400 and the housing 100.

[0054] The connection between the first shell 120 and the second shell 130 can be a detachable connection or a non-detachable connection. The first shell 120 and the second shell 130 can be connected by welding, bonding, screw connection or clamping.

[0055] The gear structure in the transmission assembly 400 is partially located in the first housing 120 and partially located in the second housing 130. The first housing 120 is provided with an oil retaining structure 110 corresponding to each gear structure, and the second housing 130 is provided with an oil retaining structure 110 corresponding to each gear structure. The oil retaining structure 110 in the first housing 120 and the oil retaining structure 110 in the second housing 130 may be arranged relative to each other or not.

[0056] In some embodiments, the first shell 120 is provided with a first surrounding wall 121, and the second shell 130 is provided with a second surrounding wall 131. The first surrounding wall 121 and the second surrounding wall 131 are both closed annular structures. One of the first surrounding wall 121 and the second surrounding wall 131 is provided with an annular groove 132, and the other is provided with an annular protrusion 122. The annular protrusion 122 is located in the annular groove 132, and the first surrounding wall 121 and the second surrounding wall 131 are arranged to form a accommodating cavity. In this arrangement, the first surrounding wall 121 and the second surrounding wall 131 are overlapped in a radial direction perpendicular to the first direction to form a side wall of the accommodating cavity. The cooperation between the annular protrusion 122 and the annular groove enables the first surrounding wall 121 and the second surrounding wall 131 to have an overlapping area in a direction perpendicular to the first direction, thereby improving the sealing performance of the accommodating cavity. The first surrounding wall 121 and the second surrounding wall 131 can block the lubricating grease on the gear structure from splashing to the outside of the accommodating cavity, thereby alleviating the problem of oil overflow of the transmission mechanism to a certain extent, improving the cleanliness of the cleaning equipment located outside the transmission mechanism of the cleaning equipment using the transmission mechanism, improving the use stability of the cleaning equipment, and improving the user experience of the cleaning equipment.

[0057] In one embodiment, the first surrounding wall 121 is provided with an annular protrusion 122, and the second surrounding wall 131 is provided with an annular groove 132. In another embodiment, the first surrounding wall 121 is provided with an annular groove 132, and the second surrounding wall 131 is provided with an annular protrusion 122.

[0058] In some embodiments, the first shell 120 and the second shell 130 are respectively provided with reinforcing ribs 123. Figures 4 to 6 As shown, the reinforcing rib 123 in the first housing 120 can be arranged between the first surrounding wall 121 and the oil retaining structure 110, and the reinforcing rib 123 in the second housing 130 can be arranged between the second surrounding wall 131 and the oil retaining structure 110. The reinforcing rib 123 can be a columnar structure, a plate structure, or a block structure, and the reinforcing rib 123 is arranged in an area in the accommodating cavity where the gear structure and the oil retaining structure 110 are not installed. In the first housing 120, a plurality of reinforcing ribs 123 can be arranged, and the plurality of reinforcing ribs 123 are arranged at intervals. The arrangement of the reinforcing rib 123 improves the structural strength of the first housing 120 and the second housing 130, and improves the anti-deformation ability of the first housing 120 and the second housing 130. Exemplarily, the first housing 120 and the second housing 130 can both be made of plastic material, which is relatively light in weight. After the reinforcing rib 123 is arranged, the anti-deformation ability of the first housing 120 and the second housing 130 is enhanced, and the protection ability of the transmission assembly 400 in the accommodating cavity is enhanced.

[0059] In some embodiments, Figure 4 and Figure 5 As shown, the second shell 130 is provided with a second surrounding wall 131, and the inner wall and outer wall of the second surrounding wall 131 are both curved structures. The inner wall of the second surrounding wall 131 is used to enclose and form a receiving cavity, that is, the inner wall of the second surrounding wall 131 is a partial area of ​​the inner wall of the receiving cavity. The inner wall surface of the second surrounding wall 131 includes a plurality of arc surfaces, and a partial area of ​​the inner wall surface of the second surrounding wall 131 is arranged adjacent to the gear structure. This part of the inner wall surface serves as an oil retaining structure 110, which plays the role of retaining oil for the gear structure. The second shell 130 is also provided with an oil retaining structure 110 independent of the second surrounding wall 131, and the oil retaining structure 110 is an arc plate-shaped structure, and the arc plate-shaped oil retaining structure 110 can be connected to the second surrounding wall 131. A reinforcing rib 123 can also be arranged between the arc plate-shaped oil retaining structure 110 and the second surrounding wall 131. The reinforcing ribs 123 may be arranged on the side of the oil retaining structure 110 away from the corresponding gear structure, and the extending direction of the reinforcing ribs 123 is the radial direction of the gear structure. The reinforcing ribs 123 may be radially distributed along the circumferential direction on the side of the oil retaining structure 110 away from the corresponding gear structure.

[0060] The second housing 130 can be used to fix the transmission mechanism to the installation location in the cleaning device. Exemplarily, the second housing 130 can be connected to the installation location of the cleaning device by bolts. A first through hole 134 can be provided on the second housing 130, and the first through hole 134 is used for passing the bolts to facilitate the assembly of the second housing 130 at the installation location of the cleaning device.

[0061] In some embodiments, a vibration isolation structure 133 may be installed on the second shell 130, and the vibration isolation structure 133 is located between the bolt and the second shell 130 to play a buffering and isolating role for the bolt, improve the connection stability of the second shell 130 at the installation location of the cleaning equipment, and reduce the vibration transmitted from the second shell 130 to the installation location of the cleaning equipment. In addition, the vibration isolation structure 133 plays a certain pre-tightening role. After the bolt is worn out after long-term use, the vibration isolation structure 133 is supported between the vibration isolation structure 133 and the bolt to improve the connection stability of the bolt. The vibration isolation structure 133 can be made of materials such as rubber and silicone, or other materials with certain elasticity. The vibration isolation structure 133 can be a cylindrical structure, and the inner hole of the cylindrical structure is used for the bolt to pass through. The vibration isolation structure 133 is installed in the outer area of ​​the second surrounding wall 131 away from the accommodating cavity. A plurality of vibration isolation structures 133 can be installed on the second shell 130, and a plurality of vibration isolation structures 133 are used for a plurality of bolts to pass through, so that the second shell 130 can be fixed to the installation location of the cleaning equipment by a plurality of bolts. The vibration isolation structure 133 and the second housing 130 may be connected by bonding, clamping, interference fit, etc. In some examples, the vibration isolation structure 133 passes through the first through hole 134, the inner hole of the vibration isolation structure 133 is coaxially arranged with the first through hole 134, and the bolt passes through the inner hole of the vibration isolation structure 133. The vibration isolation structure 133 is connected to the first through hole 134 by interference fit.

[0062] In a specific embodiment, the first through hole 134 is connected to a first opening 135, and the first opening 135 is located in a partial area of ​​the radial side of the first through hole 134, and the angle of the central angle corresponding to the first opening 135 is less than 180 degrees. Exemplarily, the angle of the central angle corresponding to the first opening 135 is less than 45 degrees. In this way, the vibration isolation structure 133 can be assembled into the first through hole 134 via the first opening 135. When the vibration isolation structure 133 passes through the first opening 135, the vibration isolation structure 133 is squeezed and deformed, and the vibration isolation structure 133 passes through the first opening 135 and moves into the first through hole 134. The shape of the vibration isolation structure 133 is restored, and the outer wall of the vibration isolation structure 133 contacts the inner wall of the first through hole 134. After the inner hole of the vibration isolation structure 133 is penetrated with a bolt, the inner and outer sides of the vibration isolation structure 133 are respectively limited by the bolt and the inner wall of the first through hole 134, so that the spacer structure is limited in the first through hole 134.

[0063] like Figure 6As shown, the first shell 120 is provided with a first surrounding wall 121, and the inner wall and outer wall of the first surrounding wall 121 are both curved structures. The inner wall of the first surrounding wall 121 is used to enclose and form a receiving cavity, that is, the inner wall of the first surrounding wall 121 is a partial area of ​​the inner wall of the receiving cavity. The inner wall surface of the first surrounding wall 121 includes a plurality of curved surfaces, and a partial area of ​​the inner wall surface of the first surrounding wall 121 is arranged adjacent to the gear structure. This part of the inner wall surface serves as an oil retaining structure 110, which plays the role of retaining oil for the gear structure. The first shell 120 is also provided with an oil retaining structure 110 independent of the first surrounding wall 121, and the oil retaining structure 110 is an arc-shaped plate-like structure, and the arc-shaped plate-like oil retaining structure 110 can be connected to the first surrounding wall 121. A reinforcing rib 123 can also be arranged between the arc-shaped plate-like oil retaining structure 110 and the first surrounding wall 121. The reinforcing ribs 123 may be arranged on the side of the oil retaining structure 110 away from the corresponding gear structure, and the extending direction of the reinforcing ribs 123 is the radial direction of the gear structure. The reinforcing ribs 123 may be radially distributed along the circumferential direction on the side of the oil retaining structure 110 away from the corresponding gear structure.

[0064] In some embodiments, the plurality of gear structures include a first gear structure 410, a second gear structure 420, a third gear structure 430, a fourth gear structure 440 and a fifth gear structure 450. The first gear structure 410 is transmission-connected to the driving structure 200, the fifth gear structure 450 is transmission-connected to the output structure 300, the second gear structure 420 includes a second upper gear portion 421 and a second lower gear portion 422 coaxially connected in a first direction, the third gear structure 430 includes a third upper gear portion 431 and a third lower gear portion 432 coaxially connected in the first direction, the fourth gear structure 440 includes a fourth upper gear portion 441 and a fourth lower gear portion 442 coaxially connected in the first direction, the first gear structure 410 is meshed with the second lower gear portion 422, the second upper gear portion 421 is meshed with the third upper gear portion 431, the third lower gear portion 432 is meshed with the fourth lower gear portion 442, and the fourth upper gear portion 441 is meshed with the fifth gear structure 450.

[0065] It is worth noting that the second gear structure 420, the third gear structure 430 and the fourth gear structure 440 are all double gears, and the double gears include two gear parts arranged along the axial direction, the two gear parts are coaxially arranged and connected, and the two gear parts rotate synchronously. In this embodiment, the upper gear part is the gear part of the two gear parts close to the first housing 120, and the lower gear part is the gear part of each gear part of the chain close to the second housing 130. When the first direction is the up and down direction, the upper gear part is located above the lower gear part.

[0066] The transmission component 400 transmits power between the driving structure 200 and the output structure 300. On the one hand, this allows a wide range of optional installation spaces for the output structure 300 and the driving structure 200, that is, the output structure 300 can be installed at a position relatively far away from the driving structure 200, while power is transmitted through the transmission component 400. On the other hand, the deceleration and force-increasing effect can be achieved by adjusting the transmission ratio of the relatively meshing gear structures.

[0067] In this embodiment, the number of teeth of the first gear structure 410 is smaller than the number of teeth of the second lower gear part 422, the number of teeth of the second upper gear part 421 is smaller than the number of teeth of the third upper gear part 431, the number of teeth of the third lower gear part 432 is smaller than the number of teeth of the fourth lower gear part 442, and the number of teeth of the fourth lower gear part 442 is smaller than the number of teeth of the fifth gear structure 450. Since the second upper gear part 421 and the second lower gear part 422 rotate synchronously and have the same rotation speed; since the third upper gear part 431 and the third lower gear part 432 rotate synchronously and have the same rotation speed; since the fourth upper gear part 441 and the fourth lower gear part 442 rotate synchronously and have the same rotation speed, in the process of the first gear structure 410 of the transmission assembly 400 transmitting power to the fifth gear structure 450, multi-stage speed reduction and torque increase are achieved. In this embodiment, the outer diameter of the first gear structure 410 is smaller than the outer diameter of the second lower gear part 422, the outer diameter of the second upper gear part 421 is smaller than the outer diameter of the third upper gear part 431, the outer diameter of the third lower gear part 432 is smaller than the outer diameter of the fourth lower gear part 442, and the outer diameter of the fourth lower gear part 442 is smaller than the outer diameter of the fifth gear structure 450. In this arrangement, the structure of the transmission assembly 400 is more compact and occupies relatively less space.

[0068] In some embodiments, the drive structure 200 includes a brushless motor. The brushless motor uses electronic commutation technology, and uses a permanent magnet rotor and an electronic controller to convert electrical energy into mechanical energy. No brushes are required. Since the brushless motor does not have brushes, there is no need to maintain and update the brushes, which increases the working life of the brushless motor, thereby increasing the service life of the transmission mechanism. The brushless motor does not need to physically contact the brushes to transfer current, thereby reducing the wear of the brushless motor and reducing operating noise.

[0069] The driving structure 200 has an output shaft, which is rotatable and connected to the first gear. The output shaft can drive the first gear to rotate. For example, the first gear has a first through hole 134, and the first gear is sleeved on the output shaft through the first through hole 134. The output shaft and the first through hole 134 are interference-fitted, so that the first gear is fixedly connected to the output shaft. The first gear is coaxially arranged with the output shaft.

[0070] The output shaft of the drive structure 200 can rotate forward and reverse. The rotation speed of the drive structure 200 can be adjusted by adjusting the duty cycle of the drive structure 200, so as to finally adjust the rotation speed of the cleaning element connected to the output structure 300, so as to realize the cleaning operation of different gears through the cleaning element. Within a certain speed range, the greater the speed of the cleaning element, the stronger the cleaning force. In this way, different cleaning forces can be selected according to the degree of dirtiness of the surface to be cleaned. In some settings, multiple cleaning gears can be set for users to choose, for example, four cleaning gears are set, and the rotation speeds of the cleaning elements of the four cleaning gears are different. Exemplarily, the four gears are respectively the maximum gear 200RPM (Revolutions Per Minute, revolutions per minute), the strong gear 170RPM, the standard gear 140RPM and the silent gear 100RPM. In other examples, two, three, five or more cleaning gears can be set. In some examples, the cleaning element can be set to stepless speed regulation, that is, the speed of the cleaning element is increased or decreased within the set range by increasing or decreasing to obtain more cleaning gears. The maximum rotation speed and the minimum rotation speed of the driving structure 200 can be limited so that the rotation speed of the cleaning element is within the maximum rotation speed and the minimum rotation speed of the cleaning element, that is, the rotation speed of the cleaning element is within the set range.

[0071] like Figure 7 and Figure 8 As shown, the first gear structure 410 and the second lower gear part 422 both include helical gears. Specifically, the first gear structure 410 and the second lower gear part 422 both include helical cylindrical gears, and the transmission efficiency of the helical cylindrical gears is higher than that of the spur cylindrical gears, and higher than that of the worm gears. The tooth surfaces of the helical gears are spiral, and the tooth surfaces of the two helical gears gradually contact when meshing, thereby reducing impact and noise, making the transmission more stable, and reducing energy loss during meshing, so that the helical gears have higher transmission efficiency.

[0072] like Figure 8As shown, there is a first gap 433 between the third upper gear portion 431 and the third lower gear portion 432, a portion of the second lower gear portion 422 is located in the first gap 433, and a portion of the fourth upper gear portion 441 is located in the first gap 433. It is worth noting that the third upper gear portion 431 is close to the first plane where the surface of the third lower gear portion 432 is located, and the third lower gear portion 432 is close to the second plane where the surface of the third upper gear portion 431 is located, and the first gap 433 is located between the first plane and the second plane. Since part of the fourth upper gear portion 441 is located in the first gap 433, the height of the fourth upper gear portion 441 is less than the height of the third upper gear portion 431. Since the fifth gear structure 450 is meshed with the fourth upper gear portion 441, the height of the fifth gear structure 450 is consistent with the height of the fourth upper gear portion 441, and the height of the fifth gear structure 450 is also less than the height of the third upper gear portion 431. The fourth upper gear portion 441 and the fifth gear structure 450 are arranged adjacent to each other, so that there is a certain space above the fourth upper gear portion 441 and the fifth gear structure 450. It is worth noting that the height of the gear structure described in this embodiment is the distance in the first direction between the top surface of the gear structure (away from the second housing 130 in the first direction) and a reference plane perpendicular to the first direction, which is located on the side of all gear structures away from the first housing 120. Exemplarily, when the transmission mechanism is applied to a cleaning device and the cleaning device is placed on the ground, where the ground is a horizontal plane and the first direction is a vertical plane, the ground can be used as a reference plane. Alternatively, when the bottom surface of the accommodating cavity (the wall surface away from the first shell 120 in the first direction) is a plane perpendicular to the first direction, the bottom surface of the accommodating cavity can be used as the reference plane.

[0073] like Fig. 9As shown, the first shell 120 has a first area 124 and a second area 125. The first area 124 is arranged opposite to the first gear structure 410, the second gear structure 420 and the third gear structure 430, and the second area 125 is arranged opposite to the fourth gear structure 440 and the fifth gear structure 450. There is a height difference between the wall surface of the first area 124 away from the accommodating cavity and the wall surface of the second area 125 away from the accommodating cavity. Since there is a certain space above the fourth upper gear part 441 and the fifth gear structure 450, the distance between the first shell 120 and the fourth upper gear part 441 and the distance between the first shell 120 and the fifth gear structure 450 can be set relatively closer, so that the surface (upper surface) of the first shell 120 away from the accommodating cavity has a height difference. The area with a higher upper surface height is called the first area 124, and the area with a lower upper surface height is called the second area 125. The height difference between the first area 124 and the second area 125 is H. Since there is a height difference between the second zone 125 and the first zone 124, there is more free space above the second zone 125. When the transmission mechanism is installed in the cleaning equipment, other structures can be assembled in the area where the height difference between the second zone 125 and the first zone 124 is located, so that the internal space of the cleaning equipment can be more effectively utilized and the layout of the cleaning equipment can be more compact.

[0074] like Fig.10As shown, the output structure 300 can rotate relative to the housing 100 and can move relative to the housing 100 along the first direction. In a specific embodiment, the output structure 300 includes a moving member 350 and a matching member 360, the moving member 350 is transmission-connected with the fifth gear structure 450, the moving member 350 can rotate under the drive of the fifth gear structure 450, and the moving member 350 can move relative to the fifth gear structure 450 in the first direction. Exemplarily, the moving member 350 and the fifth gear structure 450 can be transmission-connected by a spline structure. The inner hole of the fifth gear structure 450 is a non-circular hole, and the outer contour surface of the area where the moving member 350 extends into the inner hole of the fifth gear structure 450 is non-circular. The matching member 360 is rotatably mounted on the housing 100, and the matching member 360 is threadedly connected with the moving member 350, and the length of the thread on the moving member 350 in the first direction is greater than the length of the thread on the matching member 360 in the first direction. Exemplarily, the moving part 350 is provided with an external thread, and the matching part 360 is provided with an internal thread. In the process of the fifth gear structure 450 driving the moving part 350 to rotate, the contact area between the external thread of the moving part 350 and the internal thread of the matching part 360 is relatively small. Therefore, the friction between the moving part 350 and the matching part 360 is relatively small, which is insufficient to drive the matching part 360 to rotate. Therefore, the moving part 350 rotates relative to the matching part 360. Under the threaded cooperation, the moving part 350 moves along the first direction toward the direction away from the housing 100 while rotating. During the movement, the contact area between the external thread of the moving part 350 and the internal thread of the matching part 360 gradually increases. After moving to a cleaning position away from the housing 100, the contact area between the external thread of the moving part 350 and the internal thread of the matching part 360 is larger, and the friction between the moving part 350 and the matching part 360 is relatively large, which is sufficient to drive the matching part 360 to rotate, that is, the fifth gear structure 450 drives the matching part 360 and the moving part 350 to rotate together, and the moving part 350 only rotates at this position, and its position in the first direction remains unchanged, so as to facilitate the cleaning operation.

[0075] In some embodiments, the output structure 300 also includes a retaining frame 320, which is connected to the housing 100. For example, the retaining frame 320 is connected to the second shell 130. The retaining frame 320 is arranged around the periphery of the moving part 350 to protect the moving part 350, and the retaining frame 320 serves as an axial and radial limiting role for the moving part 350.

[0076] In some embodiments, the output structure 300 further includes an elastic member 330, which is installed between the holder 320 and the moving member 350. The elastic member 330 is used to provide a supporting reaction force for the moving member 350 when the moving member 350 is in a cleaning position away from the housing 100 and rotates, so that the moving member 350 can be more stably maintained in the cleaning position. The elastic member 330 can be a spring, a spring, a wavy elastic tube and other structures. In a specific example, the elastic member 330 is a compression spring, which is sleeved on the periphery of the moving member 350, and the two ends of the compression spring are respectively in contact with the moving member 350 and the holder 320. The compression spring is always in a compressed state between the moving member 350 and the holder 320. In some embodiments, the periphery of the moving member 350 is sleeved and connected with an assembly 340, and the compression spring abuts against the assembly 340. The arrangement of the assembly 340 facilitates the end of the compression spring to abut against the moving member 350.

[0077] Fig.11 This is an exploded view of the transmission mechanism of this application, such as Fig.11 As shown, in a specific embodiment of the present application, the transmission mechanism includes a housing 100, a driving structure 200, an output structure 300 and a transmission assembly 400, the housing 100 includes a first shell 120 and a second shell 130, the first shell 120 is installed above the second shell 130 by a second self-tapping screw 140, and a vibration isolation structure 133 is installed on the second shell 130, the vibration isolation structure 133 has an inner hole, and the vibration isolation structure 133 is used to penetrate the screws, so as to install the transmission mechanism to the installation position of the cleaning equipment by the screws.

[0078] The transmission assembly 400 includes a first gear structure 410, a second gear structure 420, a third gear structure 430, a fourth gear structure 440 and a fifth gear structure 450 that are meshed in sequence. The first gear structure 410 includes a helical gear, which can be a copper gear; the second gear structure 420, the third gear structure 430 and the fourth gear structure 440 can all be plastic double gears, which are respectively rotatably mounted in the housing 100 through an optical axis. The optical axis is a smooth cylindrical shaft structure. The optical axis is fixedly mounted in the housing 100 and can be mounted on the first housing 120 or on the second housing 130. The second gear structure 420, the third gear structure 430 and the fourth gear structure 440 are respectively rotatably assembled on the corresponding optical axis. The first gear structure 410 is connected to the output shaft of the driving structure 200, and the driving structure 200 is mounted on the side of the second housing 130 away from the first housing 120 (the bottom of the second housing 130) through a machine screw 210.

[0079] The output structure 300 includes a holder 320, a moving part 350, a matching part 360 and an elastic part 330. The holder 320 is mounted on the bottom of the second housing 130 by a first self-tapping screw 310, the moving part 350 and the matching part 360 are mounted inside the holder 320, and the moving part 350 is threadedly connected with the matching part 360, and the elastic part 330 is connected between the moving part 350 and the holder 320. A plurality of rollers 470 are mounted on the bottom of the second housing 130, and the rollers 470 are mounted on the second housing 130 through an optical axis, and the optical axis is fixedly mounted on the second housing 130, and the rollers 470 are sleeved on the optical axis, and the rollers 470 can rotate relative to the optical axis. The axial direction of the rollers 470 is perpendicular to the first direction. The plurality of rollers 470 are respectively in contact with one end of the matching part 360 in the first direction to improve the stability of the matching part 360 during the rotation process and reduce the tilt or shaking of the matching part 360. Since the matching member 360 rotates together with the moving member 350 in the cleaning position, the provision of the roller 470 can improve the stability of the moving member 350 during the rotation process and reduce the tilting or shaking of the moving member 350.

[0080] The transmission mechanism may further include a sensor 500, which is mounted on the housing 100. For example, the sensor 500 is attached to the second housing 130, and the sensor 500 may be a photoelectric sensor 500. The sensor 500 is used to detect whether the moving position of the moving member 350 in the first direction reaches the cleaning position.

[0081] The moving part 350 is connected to the fifth gear structure 450 by transmission. The fifth gear structure 450 can be connected to the housing 100 by rotation through a bearing. For example, the number of bearings is two, and the two bearings are respectively a first bearing 461 and a second bearing 462. The fifth gear structure 450 is connected to the first housing 120 by rotation through the first bearing 461, and the fifth gear structure 450 is connected to the second housing 130 by rotation through the second bearing 462. In a specific example, the first bearing 461 and the second bearing 462 are both deep groove ball bearings. In a specific example, the outer ring of the first bearing 461 of the fifth gear structure 450 is tightly matched with the first housing 120, the inner ring of the first bearing 461 is loosely matched with the fifth gear structure 450, the outer ring of the second bearing 462 is tightly matched with the second housing 130, and the inner ring of the second bearing 462 is loosely matched with the fifth gear structure 450. The first bearing 461 and the second bearing 462 are used to support the fifth gear structure 450 to rotate, so as to improve the stability of the fifth gear structure 450 during rotation. Since the fifth gear structure 450 is in transmission connection with the output mechanism, the first bearing 461 and the second bearing 462 can improve the stability of the moving member 350 in the output mechanism during the rotation process. In this embodiment, the tight fit is a relatively fixed connection, such as an interference fit assembly, and the loose fit is a relatively rotatable connection, such as a clearance fit assembly.

[0082] The embodiment of the present application also provides a cleaning device, which includes a cleaning element and the transmission mechanism provided in the above embodiment, and the cleaning element is installed on the output structure 300 of the transmission mechanism. The transmission mechanism is used to drive the cleaning element to move so as to perform a cleaning operation through the cleaning element. The cleaning element can be a brush body, a mop, and other structures.

[0083] In one example, the cleaning device also includes a mobile platform, which can be an autonomous mobile platform or a non-autonomous mobile platform. The autonomous mobile platform refers to a mobile platform that can automatically and adaptively make operational decisions based on unexpected environmental inputs; the non-autonomous mobile platform itself cannot adaptively make operational decisions based on unexpected environmental inputs, but can execute established programs or operate according to certain logic. The transmission mechanism is installed in the mobile platform, and the cleaning element is located at the bottom of the mobile platform. Exemplarily, the transmission mechanism can drive the cleaning element to move in a first direction so that the distance between the cleaning element and the surface where the mobile platform is located is controlled to contact or separate the cleaning element from the surface where the mobile platform is located. The transmission mechanism can also drive the cleaning element to rotate to perform cleaning operations on the surface where the mobile platform is located. When the mobile platform is placed on the ground, the surface where the mobile platform is located is the ground. When the cleaning device is a window wiping device and the mobile platform is placed on the glass, the surface where the mobile platform is located is the surface of the glass.

[0084] In some embodiments, the mobile platform is provided with a plurality of cleaning elements, and at least one cleaning element is mounted on the output structure 300 of the transmission mechanism provided in the above embodiment.

[0085] In a specific embodiment, the mobile platform has a relative front side and a rear side, and a relative left side and a right side, with the moving direction of the mobile platform as the front side. A cleaning element is arranged on the left side of the mobile platform, and the cleaning element is a mop, which is connected to the output structure 300 of the transmission mechanism provided in the above embodiment.

[0086] In some embodiments, the mobile platform may have an approximately circular shape. In other embodiments, the mobile platform may also have other shapes, including but not limited to an approximately D-shaped shape with a front and a rear circle.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A transmission mechanism for cleaning equipment, characterized in that: include: A housing (100), a driving structure (200), an output structure (300) and a transmission assembly (400), wherein the output structure (300) is used to connect a cleaning element; The transmission assembly (400) comprises a plurality of gear structures, the plurality of gear structures being meshed in sequence, one of the gear structures being transmission-connected to the output structure (300), another of the gear structures being transmission-connected to the drive structure (200), and the drive structure (200) driving the output structure (300) to move via the transmission assembly (400); The housing (100) has a receiving cavity, and the plurality of gear structures are installed in the receiving cavity. An oil retaining structure (110) is provided in the receiving cavity, and the oil retaining structure (110) surrounds a partial area of ​​the periphery of at least a portion of the gear structure.

2. The transmission mechanism according to claim 1, characterized in that: The housing (100) comprises a first shell (120) and a second shell (130), wherein the first shell (120) is mounted on one side of the second shell (130) in a first direction, wherein the first direction is parallel to the axial direction of the gear structure; the first shell (120) and the second shell (130) are arranged to form the accommodating cavity, and at least one of the first shell (120) and the second shell (130) is provided with the oil retaining structure (110).

3. The transmission mechanism according to claim 2, characterized in that: The first shell (120) is provided with a first surrounding wall (121), and the second shell (130) is provided with a second surrounding wall (131); the first surrounding wall (121) and the second surrounding wall (131) are both closed annular structures; one of the first surrounding wall (121) and the second surrounding wall (131) is provided with an annular groove (132), and the other is provided with an annular protrusion (122); the annular protrusion (122) is located in the annular groove (132); the first surrounding wall (121) and the second surrounding wall (131) are arranged to form the accommodating cavity.

4. The transmission mechanism according to claim 2, characterized in that: The plurality of gear structures include a first gear structure (410), a second gear structure (420), a third gear structure (430), a fourth gear structure (440) and a fifth gear structure (450), wherein the first gear structure (410) is transmission-connected to the driving structure (200), the fifth gear structure (450) is transmission-connected to the output structure (300), the second gear structure (420) includes a second upper gear portion (421) and a second lower gear portion (422) coaxially connected in the first direction, the third gear structure (430) includes a second upper gear portion (421) and a second lower gear portion (422) coaxially connected in the first direction, A third upper gear portion (431) and a third lower gear portion (432) are coaxially connected upwards, the fourth gear structure (440) includes a fourth upper gear portion (441) and a fourth lower gear portion (442) coaxially connected in the first direction, the first gear structure (410) is meshed with the second lower gear portion (422), the second upper gear portion (421) is meshed with the third upper gear portion (431), the third lower gear portion (432) is meshed with the fourth lower gear portion (442), and the fourth upper gear portion (441) is meshed with the fifth gear structure (450).

5. The transmission mechanism according to claim 4, characterized in that: A first gap (433) is provided between the third upper gear and the third lower gear, a portion of the second lower gear portion is located in the first gap (433), and a portion of the fourth upper gear portion is located in the first gap (433).

6. The transmission mechanism according to claim 5, characterized in that: The first shell (120) has a first area (124) and a second area (125), the first area (124) is arranged opposite to the first gear structure (410), the second gear structure (420) and the third gear structure (430), the second area (125) is arranged opposite to the fourth gear structure (440) and the fifth gear structure (450), and there is a height difference between the wall surface of the first area (124) away from the accommodating cavity and the wall surface of the second area (125) away from the accommodating cavity.

7. The transmission mechanism according to claim 4, characterized in that: The first gear structure (410) and the second lower gear portion both include helical gears.

8. The transmission mechanism according to any one of claims 2 to 7, characterized in that: The first shell (120) and the second shell (130) are respectively provided with reinforcing ribs (123), and the reinforcing ribs are connected to the oil retaining structure.

9. The transmission mechanism according to any one of claims 1 to 7, characterized in that: The driving structure (200) includes a brushless motor.

10. A cleaning device, characterized in that: The invention comprises a cleaning element and a transmission mechanism according to any one of claims 1 to 9, wherein the cleaning element is mounted on an output structure (300) of the transmission mechanism.

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