Gearbox assembly, travelling wheel assembly, cleaning device and cleaning system

Abstract

The utility model relates to intelligent cleaning equipment technical field discloses a gearbox assembly, walking wheel subassembly, cleaning equipment and cleaning system can simplify the internal structure of box body is favorable to reduce cost. The gearbox assembly includes the box body, drive part and variable speed transmission part. The box body includes the main part and the mounting portion, and the mounting portion is located at the main part. The drive part includes the rotor and the stator, and the stator is fixedly connected with the mounting portion, and the rotor is arranged in the mounting portion. The variable speed transmission part and the rotor are in transmission connection.

Description

Technical Field

[0001] This utility model relates to the field of intelligent cleaning equipment technology, and in particular to a gearbox assembly, a wheel assembly, a cleaning device, and a cleaning system. Background Technology

[0002] With the advancement of technology and social development, cleaning equipment for automated cleaning, such as robotic vacuum cleaners and floor scrubbers, has gradually entered people's lives. To achieve the autonomous cleaning function of cleaning equipment, a walking wheel module is usually required. The walking wheel module includes a motor, gearbox, and gears. The motor and walking wheels are connected through the gearbox, which is a relatively complex structure and not conducive to cost reduction. Utility Model Content

[0003] This invention provides a gearbox assembly, a wheel assembly, a cleaning device, and a cleaning system, which can simplify the internal structure of the gearbox and help reduce costs.

[0004] In a first aspect, the present invention provides a gearbox assembly, the gearbox assembly comprising:

[0005] The housing includes a main body and a mounting part, wherein the mounting part is disposed on the main body;

[0006] A driving component, comprising a stator and a rotor, wherein the stator is fixedly connected to the mounting portion, and the rotor passes through the mounting portion;

[0007] A speed-changing transmission component, wherein the speed-changing transmission component is connected to the rotor transmission component.

[0008] The gearbox assembly provided in this utility model includes a housing and a drive component and a transmission component disposed within the housing. The housing includes a main body and a mounting portion disposed within the main body. The drive component includes a stator and a rotor. The rotor is fixedly connected to the mounting portion, the stator passes through the mounting portion, and the stator is drively connected to the transmission component, enabling the stator to drive the transmission component. In the structure of this gearbox assembly, the stator and rotor do not require assembly with components outside the housing structure; instead, they can be directly connected to the main body of the housing. This eliminates the need for internal components for mounting the rotor and stator within the housing, and also eliminates the need for a structure for positioning and locking components to the housing. Therefore, the gearbox assembly of this utility model reduces the number of components, improves the integration of the gearbox assembly, simplifies the structure, and reduces costs.

[0009] In some possible implementations, the main body includes:

[0010] Mounting plate, wherein the mounting portion protrudes from the mounting plate and is at least partially integrally formed with the mounting plate.

[0011] In some possible implementations, the main body includes:

[0012] The housing has a receiving cavity, the mounting plate is located in the receiving cavity, and the mounting plate is used to divide the receiving cavity into a first cavity and a second cavity. The mounting part is connected to the side of the mounting plate facing the first cavity, and the speed transmission component is disposed in the second cavity.

[0013] In some possible implementations, the mounting portion includes:

[0014] A bearing assembly, which is fixed to the mounting plate.

[0015] In some possible implementations, the bearing assembly includes:

[0016] An oil-impregnated bearing is embedded in the mounting plate, and the rotor and the oil-impregnated bearing are rotatably connected.

[0017] In some possible implementations, the bearing assembly includes:

[0018] A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity;

[0019] An oil-impregnated bearing is embedded in the plastic-coated portion, and the rotor and the oil-impregnated bearing are rotatably connected.

[0020] In some possible implementations, the bearing assembly includes:

[0021] A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity;

[0022] A rolling bearing is connected to the plastic-coated part, and the rotor and the rolling bearing are rotatably connected.

[0023] In some possible implementations, the mounting portion includes:

[0024] A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity;

[0025] The inner liner is embedded in the plastic-coated part, and the rotor and the inner liner are rotatably connected.

[0026] In some possible implementations, the transmission assembly further includes:

[0027] A circuit board assembly, the circuit board assembly being fixed to the mounting portion, and at least one of the stator and the rotor being electrically connected to the circuit board assembly.

[0028] In some possible implementations, the circuit board assembly is disposed between the mounting plate and the stator.

[0029] In some possible implementations, the mounting plate is provided with a mounting groove, and the mounting part is embedded in the mounting groove.

[0030] In some possible implementations, the mounting slot is provided with a first limiting structure for restricting the mounting portion from rotating about the axis of the rotor relative to the mounting slot.

[0031] In some possible implementations, the first limiting structure includes one or more limiting grooves disposed in the mounting groove, the plurality of limiting grooves being evenly distributed along the circumference of the mounting groove, and the limiting grooves being radially recessed relative to the sidewall of the mounting groove.

[0032] The mounting part is provided with a protrusion corresponding to the limiting groove, and the protrusion is engaged with the corresponding limiting groove.

[0033] In some possible implementations, the first limiting structure further includes one or more protrusions disposed at the bottom of the mounting groove, the plurality of protrusions being evenly distributed along the circumference of the mounting groove;

[0034] The mounting part has a limiting hole corresponding to the protrusion on the side facing the protrusion, and the protrusion is engaged in the corresponding limiting hole.

[0035] In some possible implementations, the mounting portion is provided with a heat dissipation structure for dissipating heat from the stator;

[0036] The heat dissipation structure includes one or more heat dissipation holes, which are distributed circumferentially around the mounting portion and extend along the axial direction of the mounting portion.

[0037] In some possible implementations, the mounting portion is provided with a second limiting structure for limiting the stator in the axial direction.

[0038] In some possible implementations, the mounting portion includes a first mounting segment and a second mounting segment arranged along an axial direction, wherein the diameter of the first mounting segment is smaller than the diameter of the second mounting segment, so that the connection between the first mounting segment and the second mounting segment forms a stepped structure.

[0039] The step structure includes a step surface of the second mounting section facing the first mounting section, and the second limiting structure includes the step surface;

[0040] The stator is connected to the first mounting section, and the side end of the stator facing the second mounting section abuts against the stepped surface.

[0041] In some possible implementations, the mounting portion is provided with a third limiting structure for limiting the rotation of the stator relative to the mounting portion about the axis of the mounting portion.

[0042] In some possible implementations, the third limiting structure includes a stop strip disposed on the mounting portion, the stop strip protruding from the surface of the mounting portion;

[0043] The stator is provided with a stop groove, and the stop bar is engaged in the stop groove.

[0044] In some possible implementations, a fourth limiting structure is also included, which is used to limit the movement of the rotor relative to the mounting portion along the axial direction.

[0045] In some possible implementations, the fourth limiting structure includes a first gasket and a second gasket, the first gasket and the second gasket being fixedly connected to the rotor, respectively;

[0046] The first gasket and the second gasket are located on both sides of the mounting portion along the axial direction of the rotor, and the first gasket and the second gasket respectively abut against the two end faces of the mounting portion.

[0047] In some possible implementations, the rotor includes a rotor shaft and a rotor housing, one end of the rotor shaft is fixed to the rotor housing, and the rotor shaft passes through the mounting portion;

[0048] The first gasket is located between the rotor housing and the mounting portion, and the side of the first gasket facing away from the mounting portion abuts against the rotor housing.

[0049] Secondly, the present invention provides a traveling wheel assembly, including a traveling wheel and a gearbox assembly as described in any possible embodiment of the first aspect, wherein the traveling wheel is connected to the gearbox transmission component.

[0050] Thirdly, this utility model provides a cleaning device, including a machine body and a walking wheel assembly as described in the second aspect, the walking wheel assembly being disposed on the machine body.

[0051] Fourthly, this utility model provides a cleaning system, including the base station and the cleaning equipment as described in the third aspect, wherein the cleaning equipment is used in conjunction with the base station. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the cleaning system in one embodiment of the present utility model;

[0053] Figure 2 This is a schematic diagram of the structure of a cleaning device in an embodiment of the present utility model;

[0054] Figure 3 This is a structural schematic diagram of the cleaning equipment from another perspective in an embodiment of this utility model;

[0055] Figure 4 This is a schematic diagram of one structure of the walking wheel assembly in an embodiment of this utility model;

[0056] Figure 5 This is a cross-sectional structural diagram of the walking wheel assembly in an embodiment of the present utility model;

[0057] Figure 6 This is a partial cross-sectional structural diagram of the gearbox assembly in an embodiment of the present utility model;

[0058] Figure 7 This is a schematic diagram of the mounting part in one embodiment of the present utility model;

[0059] Figure 8 This is a schematic diagram of one structure of the stator in an embodiment of the present utility model;

[0060] Figure 9 This is a schematic diagram of the rotor structure in one embodiment of the present utility model;

[0061] Figure 10a This is a cross-sectional structural diagram of a rotor shaft rotatably connected to a bearing assembly in an embodiment of this utility model;

[0062] Figure 10b This is a schematic cross-sectional view of another embodiment of the present invention where the rotor shaft is rotatably connected to the bearing assembly.

[0063] Figure 11 This is a schematic diagram of the structure of the mounting plate in one embodiment of the present utility model;

[0064] Figure 12 This is a schematic diagram of a structure in which a mounting part is provided on the mounting plate in an embodiment of the present utility model;

[0065] Figure 13 This is a cross-sectional structural diagram of a mounting plate having a mounting portion in an embodiment of this utility model;

[0066] Figure 14 This is another structural schematic diagram of the mounting part in an embodiment of this utility model;

[0067] Figure 15 This is a schematic diagram of a structure in which the stator and the mounting part are fixed in an embodiment of this utility model;

[0068] Figure 16 This is a schematic diagram of a structure in which the mounting part has a first gasket on its end face in an embodiment of the present invention;

[0069] Figure 17 This is a schematic diagram of a structure within the second cavity in an embodiment of this utility model.

[0070] In the picture:

[0071] 100-Gearbox assembly; 110-Carrier housing; 111-Main body; 120-Drive component; 121-Stator; 1211-Stator core; 12111-Support; 12112-Extension; 1212-Coil; 1213-Stop groove; 122-Rotor; 1221-Rotor shaft; 1222-Rotor housing; 123-Circuit board assembly; 130-Gear transmission component; 131-Gear; 140-Mounting plate; 141-Mounting hole; 142-Mounting slot; 143-First limiting structure; 1431-Limiting groove; 1432-Protrusion; 150-Mounting part; 151-Through hole; 152-Protrusion; 1521-Snap-fit ​​surface; 153-Heat dissipation hole; 1 54-First mounting section; 155-Second mounting section; 156-Second limiting structure; 1561-Step surface; 1562-Boss; 157-Third limiting structure; 1571-Stop strip; 158-Limiting hole; 160-Bearing assembly; 161-Oil-impregnated bearing; 162-Plastic coating; 170-Fourth limiting structure; 171-First gasket; 172-Second gasket; 200-Walking wheel; 300-Housing; 1000-Cleaning equipment; 1100-Equipment body; 1110-Upper cover; 1120-Chassis; 1130-Middle frame; 1140-Walking wheel assembly; 2000-Base station; S1-First cavity; S2-Second cavity; S3-Accommodating cavity. Detailed Implementation

[0072] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0073] To enable cleaning equipment to move autonomously, related technologies typically employ a structure connecting a gearbox to wheels. The gearbox may include a housing and a motor, with the motor comprising a rotor and a stator. To assemble the motor and housing, the rotor and stator need to be connected to aluminum plates, which are then secured to the housing using screws. This results in an additional aluminum plate within the gearbox, in addition to the motor itself. Furthermore, the aluminum plate needs to be positioned and fastened to the housing with screws, leading to a complex structure with numerous components, which is not conducive to cost reduction.

[0074] Based on this, embodiments of the present invention can provide a gearbox, a wheel assembly, a cleaning device, and a cleaning system to solve the problems of complex structure and high cost in traditional gearboxes. The gearbox, wheel assembly, cleaning device, and cleaning system will be described in detail below with reference to specific embodiments. It is worth mentioning that the cleaning device in this embodiment can be a sweeping robot, a mopping robot, a sweeping and mopping robot, etc., and this embodiment does not limit it to these.

[0075] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0076] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0077] refer to Figure 1 , Figure 1 This is a schematic diagram of a cleaning system in an embodiment of the present invention. The cleaning system in this embodiment may include a cleaning device 1000 and a base station 2000. The cleaning device 1000 and the base station 2000 can be used in conjunction to enable the cleaning device 1000 to continuously carry out cleaning work.

[0078] For example, when the cleaning device 1000 needs to perform cleaning work, the cleaning device 1000 leaves the base station 2000 and performs cleaning according to a preset path. When the cleaning device 1000 finishes cleaning, it returns to the base station 2000, which can charge the cleaning device 1000 to keep it fully powered so that it can perform the next cleaning operation.

[0079] In addition, when the cleaning equipment 1000 returns to the base station 2000 after completing the cleaning, the base station 2000 can also absorb the dust, hair and other debris that the cleaning equipment 1000 has adsorbed during the cleaning process, so as to ensure that the cleaning equipment 1000 can maintain a clean state during the next cleaning.

[0080] The cleaning device 1000 in this embodiment may include a cleaning module, a sensing module, a control module, a drive module, an energy module, and a human-machine interaction module, etc. The modules can coordinate with each other to enable the cleaning device 1000 to move autonomously and thus achieve the cleaning function.

[0081] refer to Figure 2 , Figure 2 This is a schematic diagram of a cleaning device according to an embodiment of the present invention. The cleaning device 1000 may include a device body 1100, and the components of the cleaning module, sensing module, control module, drive module, energy module and human-machine interaction module mentioned above can all be integrated into the device body 1100.

[0082] Please refer to the above. Figure 2 and Figure 3 , Figure 3 This is a structural schematic diagram of the cleaning equipment from another perspective in an embodiment of the present invention. The main body 1100 of the equipment may include an upper cover 1110, a chassis 1120, and a middle frame 1130, with the middle frame 1130 disposed between the upper cover 1110 and the chassis. The middle frame 1130 serves as the basic frame for various components, and the upper cover 1110 and the chassis 1120 respectively cover the upper and lower surfaces of the middle frame 1130 to protect the internal components.

[0083] In this embodiment, the drive module provides driving force for the autonomous movement of the cleaning equipment, and the sensing module enables the cleaning equipment to perceive the working environment and provide the control module with various position and motion status information of the equipment body 1100. The control module can comprehensively determine the current working state of the equipment body 1100 (e.g., crossing a threshold, stepping on a carpet, getting stuck, dustbin full, etc.) based on the information fed back by the sensing module, and provide specific next action strategies for different situations. Furthermore, the control module can plan the most efficient and reasonable cleaning path and cleaning method based on real-time map information, thereby improving the working efficiency of the cleaning equipment. The human-machine interaction module allows users to select functions or displays the current status of the cleaning equipment or function selection options to the user. The energy module provides electrical energy for the operation of each component.

[0084] The drive module, as the source of power for the main body of the cleaning equipment 1100, is an important component of the cleaning equipment. For example... Figure 3 As shown, the drive module may include two sets of wheel assemblies 1140, which are disposed at opposite ends of the main body 1100, enabling the main body 1100 to move smoothly. A portion of the wheel assembly 1140 protrudes from the side of the chassis 1120 away from the upper cover 1110, so that the wheel assembly 1140 can directly contact the ground when the cleaning equipment is operating normally. At the same time, it allows the chassis 1120 to maintain a certain gap with the ground, preventing the chassis 1120 from being severely damaged due to friction with the ground during movement.

[0085] refer to Figure 4 , Figure 4 This is a schematic diagram of a walking wheel assembly in an embodiment of the present invention. The walking wheel assembly 1140 may include a gearbox assembly 100 and a walking wheel 200, wherein the gearbox assembly 100 is connected to the walking wheel 200 in a transmission connection, so as to drive the walking wheel 200 to roll, thereby achieving the following: Figure 2 The movement of the device body 1100 shown.

[0086] refer to Figure 5 , Figure 5 This is a cross-sectional structural diagram of the traveling wheel assembly in an embodiment of the present invention. The gearbox assembly 100 may include a housing 110, a drive component 120, and a transmission component 130. The housing 110 has an internal cavity, within which both the drive component 120 and the transmission component 130 are disposed. The drive component 120 is driveably connected to the transmission component 130, which is also driveably connected to the traveling wheel 200. The drive component 120 transmits driving force to the transmission component 130, which in turn transmits the driving force to the traveling wheel 200, thereby achieving the rolling of the traveling wheel 200.

[0087] The wheel assembly 1140 may further include a housing 300, within which the wheels 200 may be disposed, and the housing 300 provides support and protection for the wheels 200. For example, the housing 300 and the enclosure 110 may be an integral structure to enhance the overall stability of the wheel assembly 1140 structure.

[0088] Continue to refer to Figure 5 The housing 110 may include a main body 111 and a mounting portion 150 disposed on the main body 111, the mounting portion 150 being located within the accommodating cavity. Specifically, the main body 111 may include a mounting plate 140, which can be used to divide the accommodating cavity within the housing 110 into a first cavity S1 and a second cavity S2. The mounting portion 150 is connected to the side of the mounting plate 140 facing the first cavity S1. A drive member 120 may be disposed in the first cavity S1, and a transmission member 130 may be disposed in the second cavity S2.

[0089] In this embodiment, at least a portion of the mounting part 150 and the mounting plate 140 can be integrally formed. This not only enhances the fixing effect between the mounting part 150 and the mounting plate 140, but also eliminates the need for structural components used to fix the mounting part 150 and the mounting plate 140.

[0090] Please refer to the above. Figure 5 , Figure 6 as well as Figure 7 , Figure 6 This is a partial cross-sectional structural diagram of the gearbox assembly in an embodiment of this utility model. Figure 7 This is a schematic diagram of the mounting portion in one embodiment of the present invention. The driving component 120 may include a rotor 122, a stator 121, and a circuit board assembly 123, wherein at least one of the stator 121 and the rotor 122 is electrically connected to the circuit board assembly 123. The stator 121 may be fixedly connected to the mounting portion 150, and the stator 122 passes through the mounting portion 150.

[0091] For example, such as Figures 5 to 7 As shown, the rotor 122 includes a rotor shaft 1221. The mounting portion 150 is provided with a through hole 151 that passes through the mounting portion 150 along the axial direction of the rotor shaft 1221. Furthermore, the mounting plate 140 may also be provided with a mounting hole 141 that is directly opposite the through hole 151, so that the rotor shaft 1221 passes through the through hole 151 and the mounting hole 141 in sequence and is connected to the speed transmission component 130 located in the second cavity S2.

[0092] Please refer to the above. Figure 6 and Figure 8 , Figure 8This is a schematic diagram of a stator structure in one embodiment of the present invention. The stator 121 may include a stator core 1211 and multiple coils 1212. The stator core 1211 may include a support 12111 and multiple extensions 12112. The support 12111 may be an annular structure, and each extension 12112 is connected to the outer ring of the support 12111 and extends radially along the support 12111. The multiple extensions 12112 may be evenly distributed around the circumference of the support 12111, and the multiple coils 1212 are arranged in a one-to-one correspondence with the multiple extensions 12112, with each coil 1212 wound around its corresponding extension 12112. The rotor shaft 1221 passes through the center of the inner ring of the support 12111 and is coaxially arranged with the stator 121. When the coils 1212 are energized, a magnetic field is generated, thereby driving the rotor shaft 1221 to rotate.

[0093] The mounting portion 150 can be a columnar structure. When the stator 121 is assembled with the mounting portion 150, the support 12111 and the circuit board assembly 123 can be arranged around the mounting portion 150. There is a certain gap between the circuit board assembly 123 and the mounting portion 150, and the inner ring of the support 12111 is relatively fixed to the mounting portion 150. For example, the support 12111 and the mounting portion 150 can be fixed by an interference fit, or they can be fixed by adhesive bonding. Furthermore, the circuit board assembly 123 can be located between the stator 121 and the mounting plate 140 to fully utilize the space within the housing 110.

[0094] Also, please refer to Figure 6 and Figure 9 , Figure 9 This is a schematic diagram of a rotor structure in one embodiment of the present invention. The rotor 122 may further include a rotor housing 1222, one end of which has an opening. The end of the rotor shaft 1221 can extend into the rotor housing 1222 through the opening and be fixedly connected to it. In this case, the interior of the rotor housing 1222 can be considered to have a receiving cavity S3, which can be used to receive the stator 121, thus separating the stator 121 from the inner wall of the main body 111 and, to a certain extent, limiting the position of the stator 121. It is worth noting that the stator 121 and the inner wall of the rotor housing 1222 do not contact each other; they are spaced apart.

[0095] Understandably, in this embodiment, the gearbox assembly 100 includes a housing 110 comprising a main body 111 and a mounting portion 150. The main body 111 includes a mounting plate 140, and the mounting portion 150 protrudes from the mounting plate 140, and is at least partially integrally formed with the mounting plate 150. The stator 121 is fixed to the mounting portion 150, and the rotor 122 passes through the mounting portion 150. In other words, in this embodiment, the mounting portion 150 and the main body 111 of the gearbox assembly 100 can be considered as an integral structure. When the stator 121 and rotor 122 are assembled with the housing 110, they can be assembled with the housing through the mounting portion 150. Compared to traditional gearboxes, this embodiment eliminates the need for aluminum plates and screws, which not only reduces the number of structural components in the housing 110, simplifies the structure, and improves the overall integration of the gearbox assembly, but also helps to reduce costs.

[0096] In some embodiments, reference Figure 10a or Figure 10b , Figure 10a This is a cross-sectional structural diagram of a rotor shaft rotatably connected to a bearing assembly in an embodiment of this utility model. Figure 10b This is another cross-sectional view of the rotor shaft rotatably connected to the bearing assembly in an embodiment of the present invention. The mounting part 150 may include the bearing assembly 160, which is fixedly connected to the mounting plate 140. When the rotor shaft 1221 passes through the mounting part 150, the rotor shaft 1221 can be rotatably connected to the bearing assembly 160 to reduce friction between the rotor shaft 1221 and the mounting part 150, thereby ensuring that the rotor shaft 1221 can rotate smoothly.

[0097] An alternative implementation, such as Figure 10a As shown, the bearing assembly 160 may include an oil-impregnated bearing 161, which is embedded in the mounting plate 140 to maintain relative fixation between the oil-impregnated bearing 161 and the mounting plate 140. In this case, the oil-impregnated bearing 161 has an axially extending through-hole in its center, which is equivalent to the through-hole 151 of the mounting portion 150 described in the previous embodiment. The rotor shaft 1221 passes through the oil-impregnated bearing 161. The rotor shaft 1221 can rotate relative to the oil-impregnated bearing 161 about its own axis, during which the oil-impregnated bearing 161 lubricates the rotor shaft 1221.

[0098] An alternative implementation, such as Figure 10bAs shown, the bearing assembly 160 may include an oil-impregnated bearing 161 and a plastic-coated portion 162. The plastic-coated portion 162 is integrally formed with the mounting plate 140, and the plastic-coated portion 162 at least partially protrudes from the side of the mounting plate 140 facing the first cavity S1. The oil-impregnated bearing 161 is embedded in the plastic-coated portion 162. It is understood that in this embodiment, the oil-impregnated bearing 161 is integrated with the mounting plate 140 through the plastic-coating process. The rotor shaft 1221 is rotatably disposed within the oil-impregnated bearing 161 about its own axis, so that the oil-impregnated bearing 161 lubricates the rotor shaft 1221.

[0099] In one alternative embodiment, the bearing assembly 160 may include a plastic-coated portion and a rolling bearing (not shown in the figure; the rolling bearing in this embodiment can be referenced). Figure 10b The arrangement of the oil-impregnated bearing 161 can be referenced in the plastic-coated part. Figure 10b The plastic-coated portion is integrally formed with the mounting plate 140, and at least partially protrudes from the mounting plate 140 towards the first cavity S1. The rolling bearing is embedded in the plastic-coated portion; that is, the rolling bearing becomes an integral structure with the mounting plate 140 through the plastic-coating process. At this time, the outer ring of the rolling bearing is fixedly connected to the mounting plate 140, and the rotor shaft 1221 passes through and is fixedly connected to the inner ring of the rolling bearing.

[0100] In some embodiments, the mounting portion 150 may include a plastic-coated portion and an inner liner (not shown in the figures; the inner liner in this embodiment may be referred to). Figure 10b The arrangement of the oil-impregnated bearing 161 can be referenced in the plastic-coated part. Figure 10b The plastic-coated portion is integrally formed with the mounting plate 140, and at least partially protrudes from the mounting plate 140 towards the first cavity S1. An inner liner is embedded in the plastic-coated portion, and the rotor shaft 1221 passes through the inner liner and is rotatable relative to the inner liner about its own axis. At this time, at least the surface of the inner liner has a wear-resistant material, and there is a clearance fit between the rotor shaft 1221 and the inner liner.

[0101] It is worth mentioning that, in the above implementation scheme, by encapsulating the bearing onto the mounting plate 140, or by encapsulating the inner liner onto the mounting plate 140, not only is the mounting structure between the bearing and the mounting plate 140 eliminated, but the use of screws or other locking structures for fastening is also unnecessary. This simplifies the internal structure of the housing 110 and reduces the number of structural components.

[0102] In some embodiments, reference is also made to Figure 11 and Figure 12 , Figure 11 This is a schematic diagram of one structure of the mounting plate in an embodiment of this utility model. Figure 12This is a schematic diagram of a mounting plate with a mounting portion provided in an embodiment of the present invention. The mounting plate 140 is provided with a mounting groove 142, and the mounting portion 150 can be embedded in the mounting groove 142. In addition, the mounting groove 142 may also be provided with a first limiting structure 143, which can be used to restrict the mounting portion 150 from rotating relative to the mounting groove 142 around the axis of the mounting portion 150, thereby enhancing the fixing effect between the mounting portion 150 and the mounting plate 140.

[0103] In this embodiment, the mounting part 150 is fixed in the mounting groove 142. In specific implementation, for example, the bearing mentioned in the previous embodiment can be fixed in the mounting groove 142, or the plastic-coated part can be fixed in the mounting groove 142.

[0104] In specific implementation, this can be considered as an optional implementation scheme. Figure 7 , Figure 11 and Figure 12 The first limiting structure 143 may include one or more limiting grooves 1431 disposed in the mounting groove 142. The limiting grooves 1431 are disposed on the sidewall of the mounting groove 142 and are radially recessed relative to the inner wall of the mounting groove 142. Correspondingly, the mounting part 150 may be provided with a protrusion 152 corresponding to the limiting groove 1431 in the limiting groove 1431. When the mounting part 150 is engaged with the mounting groove 142, the protrusion 152 is engaged in the corresponding limiting groove 1431. Since the protrusion 152 protrudes from the surface of the mounting part 150, the protrusion 152 is engaged by the limiting grooves 1431 on both sides of the mounting part 150 in the circumferential direction, preventing the protrusion 152 from rotating relative to the limiting grooves 1431 along the axial direction of the mounting part 150. This effectively prevents relative rotation between the mounting part 150 and the mounting groove 142.

[0105] It should be noted that the "multiple" in this embodiment may refer to two or more in practical applications. Furthermore, in the following embodiments, unless otherwise specified, "multiple" can be understood as two or more.

[0106] like Figure 7 and Figure 11 As shown, the protrusion 152 provided on the surface of the mounting portion 150 may include two engaging surfaces 1521 arranged circumferentially along the mounting portion 150. The two ends of the engaging surfaces 1521 along the axial direction of the mounting portion 150 have different dimensions, so that the engaging surfaces 1521 have a trapezoidal structure. Correspondingly, the two ends of the limiting groove 1431 along the axial direction of the mounting portion 150 also have different dimensions in the radial direction of the mounting groove 142. The end of the limiting groove 1431 closer to the bottom of the mounting groove 142 has a larger dimension, and the end of the limiting groove 1431 farther from the bottom of the mounting groove 142 has a smaller dimension.

[0107] When the protrusion 152 engages with the limiting groove 1431, the larger end of the engaging surface 1521 is located at the bottom of the mounting groove 142. At this time, the limiting groove 1431 has a component extending radially along the mounting groove 142 relative to the bottom of the mounting groove 142. When the protrusion 152 and the limiting groove 1431 are engaged, the limiting groove 1431 also restricts the movement of the protrusion 152 relative to the mounting groove 142 along the axial direction of the mounting portion 150, thereby better ensuring the fixing strength between the mounting portion 150 and the mounting groove 142.

[0108] In this embodiment, the number of limiting grooves 1431 can be one, two, three, etc., and this embodiment does not limit this. For example, when the mounting groove 142 is provided with a limiting groove 1431, the limiting groove 1431 can be set at any position on the inner wall of the mounting groove 142. At this time, the dimension of the limiting groove 1431 along the circumference of the mounting groove 142 can be designed to be slightly larger, so as to increase the contact area between the limiting groove 1431 and the protrusion 152, thereby ensuring the limiting effect of the limiting groove 1431 on the mounting part 150.

[0109] Or, as Figure 7 and Figure 11 As shown, when the mounting groove 142 is provided with multiple limiting grooves 1431, the multiple limiting grooves 1431 can be evenly distributed along the circumference of the mounting groove 142. Correspondingly, the mounting part 150 is provided with multiple protrusions 152 in the same number as the limiting grooves 1431, and the multiple protrusions 152 are evenly distributed along the circumference of the mounting part 150, thereby improving the limiting effect of the limiting grooves 1431 on the mounting part 150.

[0110] Please refer to the above. Figure 7 , Figure 11 as well as Figure 13 , Figure 13 This is a cross-sectional structural diagram of a mounting plate with a mounting portion in an embodiment of the present invention. The first limiting structure 143 may further include one or more protrusions 1432 disposed at the bottom of the mounting groove 142. Correspondingly, the mounting portion 150 may also be provided with a limiting hole 158 corresponding to the protrusion 1432 facing the protrusion 1432, and the protrusion 1432 may be engaged in the corresponding limiting hole 158. Since the protrusion 1432 is engaged with the inner wall surface of the limiting hole 158, the contact area between the mounting portion 150 and the mounting groove 142 can be increased, thus enhancing the limiting effect on the mounting portion 150 in conjunction with the limiting groove 1431 and the protrusion 152. In addition, by providing the protrusion 1432, the mounting portion 150 and the mounting groove 142 can also be positioned, so that the mounting portion 150 can be installed in the mounting groove 142 at a preset angle or direction, so as to facilitate the subsequent assembly of the stator 121, rotor 122 and mounting portion 150.

[0111] In this embodiment, the number of protrusions 1432 can be one, two, three, etc. When there are multiple protrusions 1432, they can be evenly distributed around the circumference of the mounting groove 142. The mounting portion 150 can then be provided with limiting holes 158 corresponding to each of the multiple protrusions 1432, and these limiting holes 158 are evenly distributed around the circumference of the mounting portion 150. At this time, along the radial direction of the mounting groove 142, the distance between the center of the protrusion 1432 and the center of the mounting groove 142 is less than the distance between the center of the limiting groove 1431 and the center of the mounting groove 142. The mounting hole 141 provided on the mounting plate 140 is located in the inner circle surrounded by the multiple protrusions 1432. When the mounting part 150 is engaged with the mounting groove 142, the outer surface of the mounting part 150 abuts against the inner wall of the mounting groove 142, and the protrusion 1432 abuts against the inner wall of the limiting hole 158. This enhances the radial abutment effect between the mounting part 150 and the mounting groove 142, thereby enhancing the fixing effect between the mounting part 150 and the mounting groove 142.

[0112] In some other embodiments, the first limiting structure 143 provided in the mounting groove 142 can also be at least one protrusion provided on the inner wall of the mounting groove 142. Correspondingly, the mounting part 150 can be provided with at least one groove corresponding to the at least one protrusion. When the mounting part 150 is engaged with the mounting groove 142, the protrusion is engaged with the corresponding groove, which can also limit the rotation of the mounting part 150 relative to the mounting groove 142. That is to say, the positions of the protrusion and groove here are interchanged with the positions of the protrusion 152 and the limiting groove 1431 in the previous embodiment. In specific implementation, the number and arrangement of the protrusion and groove can refer to the design of the protrusion 152 and the limiting groove 1431 in the previous embodiment, which will not be repeated here.

[0113] As mentioned earlier, looking back Figure 6 The stator 121 is fixedly connected to the mounting portion 150. When the coil 1212 is energized, heat is generated, which is transferred to the mounting portion 150 through the stator core 1211. Based on this, in some embodiments, the mounting portion 150 may also be provided with a heat dissipation structure, which can be used to dissipate heat from the stator 121, thereby preventing the stator 121 from being damaged due to overheating.

[0114] Refer again Figure 6 and Figure 7 The heat dissipation structure may include one or more heat dissipation holes 153, which extend along the axial direction of the rotor shaft 1221. The heat dissipation hole 153 includes at least one opening. When the stator 121 generates heat and transfers it to the mounting part 150, the heat can be transferred to the heat dissipation hole 153 and then into the paper box 110 through the heat dissipation hole 153, thereby completing the heat dissipation work of the stator 121.

[0115] In this embodiment, the heat dissipation holes 153 can be one, two, three, or so on. When there are multiple heat dissipation holes 153, they can be spaced apart along the axial direction of the mounting portion 150. This increases the area of ​​the heat dissipation holes 153 and allows the heat generated by the stator 121 to be evenly transferred to each heat dissipation hole 153, thereby improving the heat dissipation efficiency of the heat dissipation holes 153.

[0116] Furthermore, along the axial direction of the mounting portion 150, the heat dissipation hole 153 can extend at least to the side of the circuit board assembly 123 opposite to the stator 121, so that the heat dissipation hole 153 can completely cover the stator 121 in the axial direction, thereby further improving the heat dissipation efficiency.

[0117] As described in the foregoing embodiments, the mounting portion 150 may be provided with a limiting hole 158 for engaging with the protrusion 1432 at the bottom of the mounting groove 142. As an optional implementation, such as... Figure 6 As shown, the heat dissipation hole 153 and the limiting hole 158 can be an integral structure. That is, the heat dissipation hole 153 can be disposed through the mounting part 150 along the axial direction of the mounting part 150. In this case, the heat dissipation hole 153 includes two openings disposed on both sides of the mounting part 150. In this way, the heat in the heat dissipation hole 153 can also be transferred to the mounting plate 140, and then dissipated by the mounting plate 140. That is, the area of ​​the heat dissipation hole 153 is increased, which can improve the heat dissipation efficiency of the stator 121. In addition, the protrusion 1432 at the bottom of the mounting groove 142 can extend into the heat dissipation hole 153 to limit the mounting part 150. In this embodiment, the design of the heat dissipation hole 153 can also help reduce the weight of the mounting part 150.

[0118] In some embodiments, refer again Figure 6 and Figure 7 When the stator 121 is assembled with the mounting part 150, the mounting part 150 is also provided with a second limiting structure 156, which can be used to limit the stator 121 in the axial direction to ensure that the stator 121 can be assembled with the mounting part 150.

[0119] Specifically, such as Figure 7As shown, the mounting portion 150 may include a first mounting segment 154 and a second mounting segment 155 arranged along the axial direction, wherein the diameter of the first mounting segment 154 is smaller than the diameter of the second mounting segment 155, such that the portion where the first mounting segment 154 and the second mounting segment 155 connect forms a stepped structure. The stepped structure includes a stepped surface 1561 on the side of the second mounting segment 155 facing the first mounting segment 154, and the second limiting structure 156 may include the stepped surface 1561. When the stator 121 is assembled with the mounting portion 150, the stator 121 may be connected to the first mounting segment 154, and the end face of the stator 121 facing the second mounting segment 155 may abut against the stepped surface 1561. At this time, the stepped surface 1561 can limit the stator 121 to restrict the axial movement of the stator 121 relative to the mounting portion 150.

[0120] In addition, since the stepped surface 1561 is arranged circumferentially around the second mounting section 155, the stepped surface 1561 can also support the stator 121 to enhance the fixing effect between the stator 121 and the first mounting section 154.

[0121] Alternatively, in some other embodiments, refer to Figure 14 , Figure 14 This is another structural schematic diagram of the mounting portion in an embodiment of the present invention. The mounting portion 150 may be a columnar structure, and the second limiting structure 156 may include a boss 1562 disposed on the surface of the mounting portion 150, which may be disposed around the circumference of the mounting portion 150. When the stator 121 is assembled with the mounting portion 150, the stator 121 is connected to the portion of the mounting portion 150 located on one side of the boss 1562, and the end face of the stator 121 may also abut against the end face of the boss 1562, so that the boss 1562 limits and supports the stator 121.

[0122] Referring to the figures, in some embodiments, the following are also considered: Figure 7 , Figure 8 and Figure 15 , Figure 15 This is a schematic diagram of a structure for fixing the stator and the mounting part in an embodiment of the present invention. The mounting part 150 may also be provided with a third limiting structure 157, which can be used to limit the rotation of the stator 121 relative to the mounting part 150 around the axis of the stator 121, so as to further ensure the relative fixing effect between the stator 121 and the mounting part 150.

[0123] The third limiting structure 157 may include a stop strip 1571 disposed on the mounting portion 150. The stop strip 1571 extends along the axial direction of the mounting portion 150 and protrudes from the surface of the mounting portion 150. Correspondingly, the stator 121 is provided with a stop groove 1213, which may be disposed on the inner surface of the support 12111 of the stator core 1211. When the stator 121 is assembled with the mounting portion 150, the stop strip 1571 may be engaged in the stop groove 1213. Thus, when the stator 121 is mounted on the mounting portion 150, the stator 121 cannot rotate relative to the mounting portion 150 about its axis.

[0124] Understandably, the stop strip 1571, when installed on the outer surface of the mounting portion 150, can reduce the squeezing effect between the stator 121 and the mounting portion 150 to a certain extent. Since the mounting portion 150 and the housing 110 are an integral structure in this embodiment, if the squeezing force exerted by the stator 121 on the mounting portion 150 is too large, it can easily cause deformation of the mounting portion 150, thereby increasing the friction between the through hole 151 and the rotor shaft 1221. Therefore, in this embodiment, the stator 121 and the mounting portion 150 can be fixed by adhesive bonding under the combined action of the second limiting structure 156 and the third limiting structure 157, thereby reducing the squeezing effect between them. For example, the stator 121 and the mounting portion 150 can be bonded together with quick-drying adhesive.

[0125] Furthermore, the axial end of the mounting portion 150 may be chamfered to form a guide surface. When the stator 121 is assembled with the mounting portion 150, the stator 121 is fitted onto the mounting portion 150, and the mounting portion 150 can more easily enter the inner ring of the stator core 1211, thereby reducing the squeezing effect between the stator 121 and the mounting portion 150 during the assembly process.

[0126] Similarly, a chamfer can be provided at the axial end of the through hole 151 to form a guide surface. When the rotor shaft 1221 passes through the through hole 151, the guide surface of the through hole 151 can also make it easier for the rotor shaft 1221 to enter the through hole 151, thereby improving the convenience of assembly.

[0127] In some embodiments, continue to refer to Figure 6 The gearbox assembly in this embodiment may also include a fourth limiting structure 170, which can be used to restrict the rotor shaft 1221 from moving relative to the through hole 151 along the axial direction to ensure that the rotor shaft 1221 and the through hole 151 are relatively fixed in the axial direction.

[0128] The fourth limiting structure 170 may include a first gasket 171 and a second gasket 172, which are located on both sides of the mounting portion 150 along the axial direction, and are respectively fixed relative to the rotor shaft 1221. The two end faces of the first gasket 171 along the axial direction of the rotor shaft 1221 can respectively contact the mounting portion 150 and the rotor housing 1222, thereby ensuring that the rotor housing 1222 does not contact the mounting portion 150 when the rotor shaft 1221 rotates relative to the through hole 151.

[0129] It should be noted that the reference Figure 16 , Figure 16 This is a schematic diagram of a structure in which the mounting portion end face is provided with a first gasket in an embodiment of the present invention. When the mounting portion 150 is provided with heat dissipation holes 153, the first gasket 171 can be arranged to avoid the heat dissipation holes 153, so as to avoid the first gasket 171 affecting the heat dissipation efficiency of the heat dissipation holes 153. For example, when multiple heat dissipation holes 153 are provided, the outer diameter of the first gasket 171 can be less than or equal to the diameter of the inner ring formed by the multiple heat dissipation holes 153, thereby ensuring that the first gasket 171 and the heat dissipation holes 153 do not overlap.

[0130] Continue to refer to Figure 6 The end face of the second shim 172 facing the mounting part 150 contacts the end face of the mounting part 150. Thus, with the cooperation of the first shim 171 and the second shim 172, the rotor shaft 1221 can be limited in the axial direction to prevent the rotor shaft 1221 from moving axially relative to the mounting part 150.

[0131] Since the first gasket 171 and the second gasket 172 are fixed relative to the rotor shaft 1221, when the rotor shaft 1221 rotates, the first gasket 171 and the second gasket 172 also rotate together. During this process, friction occurs because the two end faces of the first gasket 171 come into contact with the mounting portion 150 and the rotor housing 1222, respectively. To avoid the risk of increased contact between the rotor housing 1222 and the mounting portion 150 due to severe wear of the first gasket 171 during long-term use, an exemplarily wear-resistant layer can be provided on the surface of the first gasket 171 to improve its wear resistance. Alternatively, the material of the first gasket 171 can also be a wear-resistant material, such as graphite, bakelite, etc.

[0132] The second gasket 172 needs to maintain contact with the mounting part 150. In practice, the material of the second gasket 172 can be a metal material, for example, the material of the second gasket 172 can be copper.

[0133] It is worth mentioning that when the second gasket 172 is provided, the second gasket 172 can be located within the mounting hole 141 of the mounting plate 140 and rotate relative to the mounting plate 140 along with the rotor shaft 1221. In this case, the diameter of the mounting hole 141 can be designed to be approximately the same as the diameter of the second gasket 172, or the diameter of the mounting hole 141 can be slightly larger than the diameter of the second gasket 172, in order to reduce the gap between the second gasket 172 and the inner wall of the mounting hole 141. This improves the sealing effect between the first cavity S1 and the second cavity S2.

[0134] Because friction exists between the components of the drive unit 120 during operation, debris is generated. For example... Figure 17 As shown, Figure 17 This is a schematic diagram of a structure inside the second cavity in an embodiment of the present invention. Since a speed-changing transmission component 130 is provided in the second cavity S2, the speed-changing transmission component 130 is, for example, a plurality of gears 131 connected in sequence. The first cavity S1 and the second cavity S2 are separated by the mounting plate 140, which can effectively prevent debris and impurities in the first cavity S1 from entering the second cavity S2, thereby ensuring that each gear 131 can work normally.

[0135] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A gearbox assembly, characterized in that, The transmission assembly includes: The housing includes a main body and a mounting part, wherein the mounting part is disposed on the main body; A driving component, comprising a stator and a rotor, wherein the stator is fixedly connected to the mounting portion, and the rotor passes through the mounting portion; A speed-changing transmission component, wherein the speed-changing transmission component is connected to the rotor transmission component.

2. The gearbox assembly as claimed in claim 1, characterized in that, The main body includes: Mounting plate, wherein the mounting portion protrudes from the mounting plate and is at least partially integrally formed with the mounting plate.

3. The gearbox assembly as claimed in claim 2, characterized in that, The housing has a receiving cavity, the mounting plate is located in the receiving cavity and divides the receiving cavity into a first cavity and a second cavity, the mounting part is connected to the side of the mounting plate facing the first cavity, and the speed transmission component is disposed in the second cavity.

4. The gearbox assembly as claimed in claim 3, characterized in that, The mounting unit includes: A bearing assembly, which is fixed to the mounting plate.

5. The gearbox assembly as claimed in claim 4, characterized in that, The bearing assembly includes: An oil-impregnated bearing is embedded in the mounting plate, and the rotor and the oil-impregnated bearing are rotatably connected.

6. The gearbox assembly as claimed in claim 4, characterized in that, The bearing assembly includes: A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity; An oil-impregnated bearing is embedded in the plastic-coated portion, and the rotor and the oil-impregnated bearing are rotatably connected.

7. The gearbox assembly as claimed in claim 4, characterized in that, The bearing assembly includes: A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity; A rolling bearing is connected to the plastic-coated part, and the rotor and the rolling bearing are rotatably connected.

8. The gearbox assembly as claimed in claim 3, characterized in that, The mounting unit includes: A plastic-coated portion, wherein the plastic-coated portion and the mounting plate are integrally formed, and the plastic-coated portion at least partially protrudes from the side of the mounting plate facing the first cavity; The inner liner is embedded in the plastic-coated part, and the rotor and the inner liner are rotatably connected.

9. The gearbox assembly as described in any one of claims 2-8, characterized in that, The transmission assembly also includes: A circuit board assembly, the circuit board assembly being fixed to the mounting portion, and at least one of the stator and the rotor being electrically connected to the circuit board assembly.

10. The gearbox assembly as claimed in claim 9, characterized in that, The circuit board assembly is disposed between the mounting plate and the stator.

11. The gearbox assembly as claimed in any one of claims 2-8, characterized in that, The mounting plate is provided with a mounting groove, and the mounting part is embedded in the mounting groove.

12. The gearbox assembly as claimed in claim 11, characterized in that, The mounting groove is provided with a first limiting structure, which is used to restrict the mounting part from rotating about the axis of the rotor relative to the mounting groove.

13. The gearbox assembly as claimed in claim 12, characterized in that, The first limiting structure includes one or more limiting grooves disposed in the mounting groove. The plurality of limiting grooves are evenly distributed along the circumference of the mounting groove, and the limiting grooves are radially recessed relative to the sidewall of the mounting groove. The mounting part is provided with a protrusion corresponding to the limiting groove, and the protrusion is engaged with the corresponding limiting groove.

14. The gearbox assembly as claimed in claim 12 or 13, characterized in that, The first limiting structure further includes one or more protrusions disposed at the bottom of the mounting groove, the plurality of protrusions being evenly distributed along the circumference of the mounting groove; The mounting part has a limiting hole corresponding to the protrusion on the side facing the protrusion, and the protrusion is engaged in the corresponding limiting hole.

15. The gearbox assembly as described in any one of claims 1-8, characterized in that, The mounting section is provided with a heat dissipation structure, which is used to dissipate heat from the stator; The heat dissipation structure includes one or more heat dissipation holes, which are distributed circumferentially around the mounting portion and extend along the axial direction of the mounting portion.

16. The gearbox assembly as claimed in any one of claims 1-8, characterized in that, The mounting part is provided with a second limiting structure, which is used to limit the stator in the axial direction; The mounting portion includes a first mounting segment and a second mounting segment arranged along the axial direction. The diameter of the first mounting segment is smaller than the diameter of the second mounting segment, so that the connection between the first mounting segment and the second mounting segment forms a stepped structure. The step structure includes a step surface of the second mounting section facing the first mounting section, and the second limiting structure includes the step surface; The stator is connected to the first mounting section, and the side end of the stator facing the second mounting section abuts against the stepped surface.

17. The gearbox assembly as claimed in any one of claims 1-8, characterized in that, The mounting part is provided with a third limiting structure, which is used to limit the stator from rotating relative to the mounting part about the axis of the mounting part; The third limiting structure includes a stop strip disposed on the mounting portion, the stop strip protruding from the surface of the mounting portion; The stator is provided with a stop groove, and the stop bar is engaged in the stop groove.

18. The gearbox assembly as claimed in any one of claims 1-8, characterized in that, It also includes a fourth limiting structure, which is used to restrict the rotor from moving relative to the mounting part along the axial direction; The fourth limiting structure includes a first gasket and a second gasket, which are respectively fixedly connected to the rotor. The first gasket and the second gasket are located on both sides of the mounting portion along the axial direction of the rotor, and the first gasket and the second gasket respectively abut against the two end faces of the mounting portion.

19. The gearbox assembly according to claim 18, characterized in that, The rotor includes a rotor shaft and a rotor housing, one end of the rotor shaft is fixed to the rotor housing, and the rotor shaft passes through the mounting portion; The first gasket is located between the rotor housing and the mounting portion, and the side of the first gasket facing away from the mounting portion abuts against the rotor housing.

20. A walking wheel assembly, characterized in that, It includes a traveling wheel and a gearbox assembly as described in any one of claims 1-19, wherein the traveling wheel is connected to the transmission component in a transmission.

21. A cleaning device, characterized in that, It includes a machine body and a walking wheel assembly as described in claim 20, the walking wheel assembly being disposed on the machine body.

22. A cleaning system, characterized in that, It includes a base station and the cleaning equipment as described in claim 21, the cleaning equipment being used in conjunction with the base station.

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