An electric machine

Abstract

Some embodiments of the present specification provide an electric machine, comprising a housing, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly being arranged in the housing; the rotor assembly is rotatable relative to the stator assembly, the rotor assembly comprising a rotating shaft and a driven part connected to the rotating shaft, the driven part comprising a driven part body and a flow guide ring, the flow guide ring being connected to one end of the driven part body close to the stator assembly, the flow guide ring comprising at least one flow guide structure; when the rotor assembly rotates, at least part of the liquid on the driven part is separated from the driven part along the flow guide structure at least under the action of inertial force.

Description

Technical Field

[0001] This specification relates to the field of motor structure technology, and in particular to a motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the principle of electromagnetic induction, and it is widely used in various industrial fields. When an electric motor operates in a wet environment, effective waterproofing measures must be taken to prevent moisture from seeping into the motor and causing structural damage.

[0003] Therefore, there is an urgent need to provide an effective waterproof motor. Summary of the Invention

[0004] This specification provides one or more embodiments of an electric motor, including: a housing; a stator assembly disposed within the housing; and a rotor assembly disposed within the housing. The rotor assembly is rotatable relative to the stator assembly. The rotor assembly includes a shaft and a driven member connected to the shaft. The driven member includes a driven member body and a guide ring. The guide ring is connected to one end of the driven member body near the stator assembly and includes at least one guide structure. When the rotor assembly rotates, at least a portion of the liquid on the driven member is dislodged from the driven member along the guide structure under the action of inertial force.

[0005] In some embodiments, the at least one flow guiding structure includes an arc-shaped flow guiding portion or an inclined flow guiding portion, which is disposed on the end of the flow guiding member near the driven member. From the end away from the stator assembly to the end near the stator assembly, the inner side surface of the arc-shaped flow guiding portion or the inclined flow guiding portion gradually moves away from the end of the flow guiding member near the driven member.

[0006] In some embodiments, the at least one flow guiding structure includes a tapered flow guiding portion, the inner surface of which is tapered, and the tapered flow guiding portion is disposed at one end of the flow guiding member near the driven member. The inner diameter of the tapered flow guiding portion increases from the end away from the stator assembly to the end near the stator assembly.

[0007] In some embodiments, the outer surface of the tapered guide portion is tapered, and the outer diameter of the tapered portion increases from the end away from the stator assembly to the end closer to the stator assembly.

[0008] In some embodiments, the flow guiding structure includes a first annular flow guiding groove, the opening of which faces away from the rotating shaft.

[0009] In some embodiments, the flow guiding structure includes a distal cone portion connected to one end of the tapered flow guiding portion away from the stator assembly, and the distal cone portion and the tapered flow guiding portion form the first annular flow guiding groove.

[0010] In some embodiments, the outer diameter of the distal tapered portion decreases from the end furthest from the stator assembly toward the end closest to the stator assembly.

[0011] In some embodiments, the driven body includes an impeller, the housing has a flow channel, at least a portion of the at least one flow channel is located within the flow channel, the housing also includes a fluid outlet, and rotation of the impeller can generate an airflow within the flow channel toward the fluid outlet.

[0012] In some embodiments, the extension range of the flow channel along the first direction at least partially overlaps with the extension range of the stator assembly along the first direction.

[0013] In some embodiments, the fluid outlet is located along a first direction near the end of the stator assembly away from the rotor assembly.

[0014] In some embodiments, the system further includes a flow guide connected to the stator assembly; the follower at least partially surrounds the flow guide, and the projections of the flow guide and the follower along a first direction at least partially overlap; the flow guide includes a liquid drainage portion; the stator assembly includes a fluid outlet; and the liquid drainage portion and the fluid outlet are in communication regions.

[0015] In some embodiments, the driven member and the guide member are disposed in a non-contact manner.

[0016] In some embodiments, the guide includes a first blocking portion disposed on one end of the guide near the driven member.

[0017] In some embodiments, the first blocking portion includes a blocking surface facing the end of the stator assembly away from the follower.

[0018] In some embodiments, the flow guide includes a second blocking portion, and the liquid guiding portion includes at least one second annular flow guide groove, wherein at least one second annular flow guide groove is located between the first blocking portion and the second blocking portion.

[0019] In some embodiments, the dimension of the second blocking portion in the direction perpendicular to the first direction is greater than the dimension of the first blocking portion in the direction perpendicular to the first direction.

[0020] In some embodiments, at least one of the second annular guide channels is hydrophobic.

[0021] In some embodiments, one end of the tapered flow guide near the stator assembly protrudes along the first direction from the outer edge of the liquid flow guide near the stator assembly.

[0022] In some embodiments, the flow guide ring includes a baffle that protrudes around the inner side of the flow guide ring.

[0023] In some embodiments, along the first direction, the baffle does not extend beyond the end of the guide member near the driven member.

[0024] In some embodiments, a first blocking portion is provided at one end of the guide member near the driven member, and the baffle is positioned corresponding to the first blocking portion along the first direction.

[0025] In some embodiments, the stator assembly includes a stator core and a winding, the housing includes a first housing portion, the winding is wound in the stator core, and at least a portion of the stator core is located within the first housing portion.

[0026] In some embodiments, the flow guide is sleeved on one end of the first housing near the driven member.

[0027] In some embodiments, the housing includes a second housing portion, which is spaced apart from the first housing portion, and a flow channel is formed between the second housing portion and the first housing portion, the flow channel being in communication with the fluid outlet.

[0028] In some embodiments, the flow guide is disposed between the second shell portion and the first shell portion, and the liquid drainage portion is in communication with the flow guide channel.

[0029] In some embodiments, the flow guide includes a noise reduction section disposed within the flow guide channel.

[0030] In some embodiments, the noise reduction unit includes a plurality of guide vanes arranged circumferentially along the guide member.

[0031] In some embodiments, the end of the follower near the stator assembly is disposed within the flow channel. Attached Figure Description

[0032] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0033] Figure 1This is a schematic diagram of a motor according to some embodiments of this specification; Figure 2 This is a cross-sectional structural schematic diagram of the motor according to some embodiments of this specification; Figure 3 This is a cross-sectional structural schematic diagram of some components of the motor according to some embodiments of this specification; Figure 4A yes Figure 3 An enlarged schematic diagram at point N; Figure 4B yes Figure 3 An enlarged schematic diagram at point N; Figure 5 This is a cross-sectional structural diagram of three second annular guide grooves as shown in some embodiments of this specification; Figure 6 This is a cross-sectional structural diagram of three second annular guide grooves as shown in some other embodiments of this specification; Figure 7 This is a schematic cross-sectional view of a tapered guide section having the same taper, as shown in some embodiments of this specification. Figure 8 These are schematic cross-sectional views of tapered guide sections with different tapers, as shown in some embodiments of this specification. Figure 9 This is a partial structural schematic diagram of the motor according to some embodiments of this specification. Detailed Implementation

[0034] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0035] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the principle of electromagnetic induction. When an electric motor operates in a wet environment, effective waterproofing measures must be taken to prevent moisture from seeping into the motor and causing structural damage.

[0036] In some embodiments, the motor may employ an oil-sealed design to achieve waterproof sealing. However, when such motors are used in cleaning robots, the oil seals are prone to failure because the robots easily come into contact with and inhale oil. Furthermore, these motors are often high-speed motors, typically operating at speeds of 80,000 to 100,000 RPM. The contact-sealed structure increases operating resistance, thereby affecting motor output efficiency and leading to increased energy consumption.

[0037] In some embodiments, the stator of the motor often adopts an assembled structure. However, during the assembly process, it is difficult to guarantee the precision and consistency of the internal components of the stator, which may lead to high-frequency vibration during motor use, and thus generate high-frequency noise.

[0038] Therefore, there is a need to provide a motor that solves the aforementioned waterproofing and vibration problems by setting a flow guiding structure and encapsulating part of the electrode structure.

[0039] Figure 1 This is a schematic diagram of a motor according to some embodiments of this specification. Figure 2 This is a cross-sectional structural schematic diagram of the motor according to some embodiments of this specification. Figure 3 This is a cross-sectional structural schematic diagram of some components of the motor shown in some embodiments of this specification.

[0040] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the motor 100 includes: a housing 114, a stator assembly 110, and a rotor assembly 120.

[0041] The housing 114 is used to support and protect other components inside the motor 100.

[0042] The stator assembly 110 provides a rotating magnetic field to the rotor assembly. In some embodiments, the stator assembly is a fixed assembly within the motor 100. In some embodiments, such as Figure 1 As shown, the stator assembly 110 is disposed within the housing 114 of the motor 100. The stator assembly 110 can generate a rotating magnetic field.

[0043] The rotor assembly 120 rotates under the influence of a rotating magnetic field to output mechanical energy. In some embodiments, the rotor assembly 120 is disposed within the housing 114 and is rotatable relative to the stator assembly 110. For example, the rotor assembly 120 may rotate relative to the stator assembly 110 under the influence of a rotating magnetic field.

[0044] In some embodiments, the rotor assembly 120 includes a shaft 121 and a follower 122 connected to the shaft 121.

[0045] The rotating shaft 121 refers to the power output shaft of the rotor assembly 120. The rotor assembly 120 can rotate about axis A of the rotating shaft 121.

[0046] Follower 122 refers to the component in rotor assembly 120 that rotates together with shaft 121. For example, follower 122 can be a coupling, impeller, pump wheel, etc.

[0047] In some embodiments, such as Figure 2 and Figure 3 As shown, the stator assembly 110 has a first cavity 1121, and the rotating shaft 121 is rotatably disposed in the first cavity 1121. The rotating shaft 121 passes through the stator assembly 110 and one end of the rotating shaft 121 is fixedly connected to the driven member 122, thereby driving the driven member 122 to rotate synchronously relative to the stator assembly 110.

[0048] In some embodiments, the follower 122 includes a follower body 1221 and a guide ring 1222. The guide ring 1222 is connected to one end of the follower body 1221 near the stator assembly 110, and includes at least one guide structure 12221. Liquid outside the motor 100 flows onto and adheres to the follower 122. When the rotor assembly 120 rotates, it drives the follower 122 to rotate, and at least a portion of the liquid adhering to the follower 122 is detached from the follower 122 along the guide structure 12221 under the action of inertial force (i.e., centrifugal force). Further description of the follower body 1221 and the guide ring 1222 of the follower 122 is provided below.

[0049] In some embodiments, the motor 100 further includes a flow guide 130. The flow guide 130 is used to collect and drain liquid, preventing liquid from entering the motor 100 and thus protecting the motor 100. In some embodiments, the flow guide 130 is connected to the stator assembly 110. For example, the flow guide 130 and the stator assembly 110 are directly fixedly connected by screwing, welding, or other methods. Alternatively, the flow guide 130 and the stator assembly 110 are indirectly connected by being respectively fixed to the housing 114. Or, the flow guide 130 may be integrally formed with the stator assembly 110.

[0050] In some embodiments, the follower 122 at least partially surrounds the guide member 130, and the projection of the guide member 130 and the follower 122 along the first direction X at least partially overlaps. The guide member 130 includes a liquid drainage portion 131, and the stator assembly 110 includes a fluid outlet 111. The liquid drainage portion 131 and the fluid outlet 111 are in communication. The first direction X is parallel to the direction in which the axis A of the rotating shaft 121 extends.

[0051] The liquid guide section 131 is used to guide the liquid collected by the guide member 130 to the fluid outlet 111. The fluid outlet 111 is used to discharge the liquid out of the motor 100.

[0052] In some embodiments, the side of the guide member 130 near the follower 122 is provided as a liquid drainage portion 131, which is disposed around the axis A of the rotating shaft 121. In some embodiments, the liquid drainage portion 131 includes a bottom wall extending along a first direction X, a side wall at one end away from the follower 122, and a side wall at one end near the follower 122.

[0053] In some embodiments, the follower 122 partially surrounds the guide 130, meaning the follower 122 partially encircles the guide 130, and the follower 122 forms an annular surrounding path outside the guide 130, such that a portion of the guide 130 near the follower 122 is blocked by the follower 122 in a direction perpendicular to the first direction X, while the projection of the guide 130 and the follower 122 along the first direction overlaps. In some embodiments, the follower 122 completely surrounds the guide 130, meaning the follower 122 completely encircles the guide 130, and the follower 122 forms an annular surrounding path outside the guide 130, such that the guide 130 is completely blocked by the follower 122 in a direction perpendicular to the first direction X, while the projection of the guide 130 and the follower 122 along the first direction X completely overlaps.

[0054] In some embodiments, the liquid inlet 131 and the fluid outlet 111 are connected regions. The connected region is the area formed by the liquid inlet 131 and the fluid outlet 111 that provides a continuous flow space for the fluid; that is, the liquid inlet 131 and the fluid outlet 111 are interconnected. Under the influence of gravity, the liquid can flow in the liquid inlet 131 along the Y direction to the liquid outlet 111, and then be discharged outside the motor 100.

[0055] In some embodiments of this specification, by providing a guide, liquid entering the motor can be discharged, preventing the liquid and contaminants in the liquid from reaching the oil seal position at the shaft of the stator assembly, thereby preventing the oil seal from being damaged and improving waterproofing.

[0056] In some embodiments, the follower 122 and the guide 130 are disposed in a non-contact manner.

[0057] The non-contact setting can be understood as having a gap between the follower 122 and the guide 130. In some embodiments, since the stator assembly 110 is rotatably connected to the rotor assembly 120, and the follower 122 is connected to the shaft 121 of the rotor assembly 120, a stable non-contact connection can be formed between the follower 122 and the guide 130. Furthermore, through the guiding effect of the liquid guide 131, the liquid flows in the liquid guide 131 without overflowing from it.

[0058] In some embodiments of this specification, the driven member and the guide member are arranged in a non-contact manner, which can avoid energy loss caused by friction and ensure the output efficiency of the motor.

[0059] Figure 4A yes Figure 3 An enlarged schematic diagram at point N. Figure 4B yes Figure 3An enlarged schematic diagram at point N.

[0060] In some embodiments, such as Figure 3 , Figure 4A and Figure 4B As shown, the guide member 130 includes a first blocking part 132, which is disposed on the guide member 130 near one end of the driven member 122.

[0061] The first blocking portion 132 is used to prevent liquid from overflowing from the liquid drain portion 131 to the position where the follower 120 and the stator assembly 110 are connected by the rotating shaft 121. In some embodiments, the first blocking portion 132 is formed by the sidewall of the liquid drain portion 131 near the end of the follower 122.

[0062] In some embodiments, the first blocking portion 132 is approximately annular, with its central axis coinciding with axis A. The dimension of the first blocking portion 132 in the direction perpendicular to the first direction X can be considered as the difference between the outer diameter and the inner diameter of the annulus. In some embodiments, the dimension N1 of the first blocking portion 132 in the direction perpendicular to the first direction X is 0.1 mm to 3 mm. In some embodiments, the dimension N1 of the first blocking portion 132 in the direction perpendicular to the first direction X is 0.5 mm to 2.5 mm. In some embodiments, the dimension N1 of the first blocking portion 132 in the direction perpendicular to the first direction X is 1 mm to 2 mm. In some embodiments, the dimension N1 of the first blocking portion 132 in the direction perpendicular to the first direction X is 1.5 mm.

[0063] In some embodiments of this specification, by providing a first blocking part with an appropriate size, it is possible to avoid the arrangement of other structures being affected by the first blocking part being too long in the direction perpendicular to the first direction X; on the other hand, it is possible to avoid liquid flowing from the liquid drainage part into the gap between the follower and the stator assembly due to the size being too short.

[0064] In some embodiments, such as Figure 4A As shown, the first blocking part 132 includes a blocking surface 1321, which faces the end of the stator assembly 110 away from the follower 122.

[0065] In some embodiments, at least a portion of the blocking surface 1321 is perpendicular to the first direction X.

[0066] In some embodiments of this specification, by setting at least a portion of the blocking surface perpendicular to the first direction, the blocking portion can have a better blocking effect.

[0067] In some embodiments, such as Figure 4AAs shown, the flow guide 130 includes a second blocking part 133, and the liquid guiding part 131 includes at least one second annular flow guide groove 1311, with the at least one second annular flow guide groove 1311 located between the first blocking part 132 and the second blocking part 133.

[0068] The second blocking portion 133 is used to isolate the stator assembly 110 and the liquid drain portion 131. In some embodiments, the second blocking portion 133 is formed by the sidewall of the end of the liquid drain portion 131 away from the follower 122.

[0069] In some embodiments, the second blocking portion 133 is approximately annular, with its central axis coinciding with axis A. The dimension of the second blocking portion 133 in the direction perpendicular to the first direction X can be considered as the difference between the outer diameter and the inner diameter of the annulus. In some embodiments, the dimension N2 of the second blocking portion 133 in the direction perpendicular to the first direction X is greater than the dimension N1 of the first blocking portion 132 in the direction perpendicular to the first direction X.

[0070] In some embodiments of this specification, by setting the size of the second blocking part in the direction perpendicular to the first direction to be larger than the size of the first blocking part in the direction perpendicular to the first direction, on the one hand, the guide member can play the role of collecting water and guiding the liquid into the second annular guide groove; on the other hand, the second blocking part can better match the structure of the stator assembly.

[0071] In some embodiments, the distance N3 between the first blocking portion 132 and the second blocking portion 133 is 0.1mm to 2.5mm. In some embodiments, the distance N3 between the first blocking portion 132 and the second blocking portion 133 is 0.5mm to 2mm. In some embodiments, the distance N3 between the first blocking portion 132 and the second blocking portion 133 is 0.8mm to 1.5mm. In some embodiments, the distance N3 between the first blocking portion 132 and the second blocking portion 133 is 0.9mm to 1.2mm. In some embodiments, the distance N3 between the first blocking portion 132 and the second blocking portion 133 is 1mm. The distance N3 between the first blocking portion 132 and the second blocking portion 133 can be understood as the distance in the first direction X from the end of the first blocking portion 132 away from the driven member 122 to the end of the second blocking portion 133 near the driven member 122.

[0072] In some embodiments of this specification, by limiting the minimum distance between the first blocking part and the second blocking part, the liquid guiding part can accommodate enough liquid; by limiting the maximum distance between the first blocking part and the second blocking part, the problem of the guide member occupying too much space and hindering the arrangement of other components can be avoided.

[0073] The second annular guide groove 1311 refers to the groove structure formed by the liquid guiding portion 131. In some embodiments, the first blocking portion 132 is formed by the proximal sidewall of the liquid guiding portion 131, and the second blocking portion 133 is formed by the distal sidewall of the liquid circulating portion 131. At least one second annular guide groove 1311 is respectively connected to the end sidewall of the first blocking portion 132 away from the follower 122 and the end sidewall of the second blocking portion 133 near the follower 122, so that at least one second annular guide groove 1311 is located between the first blocking portion 132 and the second blocking portion 133. In some embodiments, the first blocking portion 132 is formed by the proximal sidewall of the liquid circulating portion 131, and the second blocking portion 133 is formed by the distal sidewall of the liquid circulating portion 131. The proximal sidewall and the distal sidewall are connected, thereby forming at least one second annular guide groove 1311 between the two sidewalls.

[0074] In some embodiments, at least one second annular guide groove 1311 is hydrophobic.

[0075] In some embodiments, the second annular flow channel 1311 can be hydrophobic in various ways. For example, the surface of the second annular flow channel 1311 can be modified (e.g., coated with a hydrophobic coating, subjected to plasma implantation, etc.) to make the second annular flow channel 1311 hydrophobic. Alternatively, the second annular flow channel 1311 can also be made of a hydrophobic material.

[0076] In some embodiments of this specification, since the second annular guide groove is hydrophobic, the liquid in the second annular guide groove is less likely to adhere to the groove and is more likely to be discharged from the second annular guide groove, thereby giving the motor better drainage capacity and waterproof effect.

[0077] Figure 5 This is a cross-sectional structural diagram of three second annular guide channels as shown in some embodiments of this specification. Figure 6 This is a cross-sectional structural diagram of three second annular guide grooves as shown in some other embodiments of this specification.

[0078] In some embodiments, there are multiple second annular guide channels 1311, and the multiple second annular guide channels 1311 are arranged at intervals along the first direction X. The number of second annular guide channels 1311 can be determined based on actual needs (such as structural space layout, waterproofing requirements, etc.).

[0079] The spacing arrangement can be understood as follows: there is a preset distance between the multiple second annular guide channels 1311. The preset distance can be set based on experience, and the preset distance between the multiple second annular guide channels 1311 can be the same or different. In some embodiments, intermediate sidewalls with the same or different thicknesses / lengths are provided between the multiple second annular guide channels 1311, so that there is a preset distance between the multiple second annular guide channels 1311. The thickness refers to the distance between the two walls of the intermediate sidewall in the first direction X.

[0080] For example only, such as Figure 5 and Figure 6 As shown, there are three second annular guide channels 1311. In the first direction X, from the end away from the follower 122 to the end close to the follower 122, a first intermediate sidewall 131-1 and a second intermediate sidewall 131-2 are arranged between the three second annular guide channels 1311, so that the three second annular guide channels 1311 are arranged at intervals along the first direction X.

[0081] In some embodiments of this specification, by providing multiple second annular guide grooves, more liquid can be contained, preventing liquid overflow and increasing the waterproof performance of the motor.

[0082] In some embodiments, the depths of the plurality of second annular guide channels 1311 may be the same or different. The depth of the second annular guide channel 1311 refers to the distance from the bottom of the second annular guide channel 1311 to the top of the smaller sidewall of the second annular guide channel 1311 in a direction perpendicular to the first direction X.

[0083] In some embodiments, among the plurality of second annular guide grooves 1311, the depth of the second annular guide groove 1311 closest to the follower 122 is less than the depth of at least one of the remaining second annular guide grooves 1311.

[0084] In some embodiments, the second annular guide groove 1311 is deeper the further away from the follower 122 along the first direction X. This is merely an example. Figure 5 As shown, in the first direction X, from the end away from the follower 122 to the end near the follower 122, the depths of the second annular guide groove 1311 are H1, H2, and H3 respectively, and H1 > H2 > H3.

[0085] In some embodiments, the second annular guide groove is deeper the further away from the driven member, which facilitates the collection of more liquid in the second annular guide groove away from the driven member and improves the waterproof performance of the motor.

[0086] In some embodiments, the sidewalls of the plurality of second annular guide grooves 1311 near the driven member have progressively larger dimensions in a direction perpendicular to the first direction X.

[0087] In some embodiments, disregarding the first blocking portion 132 and the second blocking portion 133, along the first direction X, the closer to the follower 122, the larger the size of the middle sidewall of the plurality of second annular guide grooves 1311.

[0088] For example only, such as Figure 6 As shown, in the first direction X, from the end away from the follower 122 to the end near the follower 122, the size of the first intermediate sidewall 131-1 is L1, the size of the second intermediate sidewall 131-2 is L2, and L1 < L2.

[0089] In some embodiments of this specification, the sidewall of the second annular guide channel is larger in the direction perpendicular to the first direction, which can prevent liquid from overflowing from the side of the second annular guide channel near the driven member.

[0090] In some embodiments, such as Figure 3 As shown, the driven member 122 includes a driven member body 1221 and a guide ring 1222. The guide ring 1222 is connected to one end of the driven member body 1221 near the stator assembly 110. The guide ring 1222 includes at least one guide structure 12221. The motor 100 operates in an environment with external liquid. The liquid outside the motor 100 flows onto the driven member 122 and adheres to it. When the rotor assembly 120 rotates, the driven member 122 rotates accordingly. Some or all of the liquid adhering to the driven member 122 will move along the guide structure 12221 towards the direction away from the axis A of the driven member 122 under the action of inertial force (centrifugal force), thereby detaching from the driven member 122.

[0091] The driven body 1221 is used to implement the function of the device that sets the motor. For example, when the device is a sweeping robot, the driven body 1221 can be used to clean up dirt, and the driven body 1221 can be an impeller, pump wheel, etc.

[0092] In some embodiments, the follower body 1221 includes an impeller 12211, a flow channel 1143 is formed in the housing 114, at least a portion of at least one flow guide structure 12221 is located in the flow channel 1143, the housing 114 also includes a fluid outlet 111, and rotation of the impeller 12211 can generate an airflow in the flow channel 1143 that flows toward the fluid outlet 111.

[0093] The flow channel 1143 is used to guide airflow and wastewater. The flow channel 1143 communicates with the fluid outlet 111. In some embodiments, the extension range of the flow channel 1143 along the first direction X at least partially overlaps with the extension range of the stator assembly 110 along the first direction X, such that the flow channel 1143 can communicate with the fluid outlet 111 and adequately guide the airflow and wastewater.

[0094] In some embodiments, the fluid outlet 111 is located near the end of the stator assembly 110 away from the rotor assembly 120 along the first direction X, that is, there is a certain distance between the fluid outlet 111 and the rotor assembly 120, thereby ensuring the drainage effect of the fluid outlet 111.

[0095] The flow guide ring 1222 is used to guide liquids. For example, the flow guide ring 1222 can discharge wastewater used to drain sludge.

[0096] In some embodiments, in a direction perpendicular to the first direction X, the guide ring 1222 is further away from the axis A relative to the guide member 130. The guide ring 1222 is correspondingly disposed with respect to the liquid drainage portion 131 of the guide member 130, and the guide ring 1222 and the guide member 130 do not contact each other. The guide ring 1222 can surround the guide member 130, providing a certain degree of obstruction to the liquid drainage portion 131 of the guide member 130, thereby reducing the amount of liquid entering the liquid drainage portion 131. The guide ring 1222 communicates with the fluid outlet 111, and the liquid drainage portion 111 of the guide member 130 is a communicating region.

[0097] In some embodiments, the outer diameter of the second blocking portion 133 is set to be larger, so that it is closer to the guide ring 1222, thereby reducing the opening between the guide member 130 and the guide ring 1222 and limiting the amount of liquid entering the liquid guide portion 131.

[0098] In some embodiments, the size of the opening between the guide member 130 and the guide ring 1222 refers to the distance of the opening in a direction perpendicular to the first direction X. In some embodiments, the size of the opening is 0.1 mm to 1.5 mm. In some embodiments, the size of the opening is 0.2 mm to 1 mm. In some embodiments, the size of the opening is 0.3 mm to 0.8 mm. In some embodiments, the size of the opening is 0.4 mm to 0.6 mm. In some embodiments, the size of the opening is 0.3 mm.

[0099] In some embodiments, the follower body 1221 and the guide ring 1222 are separate structures.

[0100] For example, after the driven component body 1221 and the guide ring 1222 are manufactured separately, they are assembled into one unit by means of bonding, welding, bolting, etc. This arrangement makes it convenient for users to disassemble and replace or clean the driven component body 1221 and the guide ring 1222 later.

[0101] In some embodiments, the follower body 1221 and the guide ring 122 are integrally formed. With this configuration, there is no gap between the follower body 1221 and the guide ring 122, making it difficult for sewage to flow into the space between the follower 122 and the stator assembly 110, thus improving the motor's waterproof performance.

[0102] The flow guiding structure 12221 is a structure that guides the sewage in the flow ring 1222 to minimize the amount of liquid entering the liquid inlet 131 of the flow guide 130. In some embodiments, the number of flow guiding structures 12221 can be set based on actual needs (such as sewage volume).

[0103] In some embodiments of this specification, by providing the driven body 1221 and the guide ring 1222, the sweeping robot can prevent sewage from entering the motor while performing the function of cleaning dirt, thereby increasing the motor's waterproof performance and service life.

[0104] In some embodiments, the flow guiding structure 12221 includes an arc-shaped flow guiding portion or an inclined flow guiding portion, which is disposed over the end of the flow guiding member 130 near the driven member 122. From the end away from the stator assembly 110 towards the end near the stator assembly 110, the inner surface of the arc-shaped flow guiding portion or the inclined flow guiding portion gradually moves away from the end of the flow guiding member 130 near the driven member 122. The arc-shaped flow guiding portion or the inclined flow guiding portion facilitates the discharge of wastewater covering its outer surface.

[0105] In some embodiments, such as Figure 4B As shown, the flow guiding structure 12221 includes a tapered flow guiding section 122211. The inner surface of the tapered flow guiding section 122211 is tapered. The tapered flow guiding section 122211 is disposed at the end of the flow guiding member 130 near the driven member 122. The inner diameter of the tapered flow guiding section 122211 increases from the end away from the stator assembly 110 to the end near the stator assembly 110.

[0106] The conical guide section 122211 is used to eject the sewage covering its surface.

[0107] In some embodiments, such as Figure 4B As shown, the inner surface M of the tapered guide section 122211 is tapered, and the inner diameter of the tapered section increases from the end away from the stator assembly 110 to the end closer to the stator assembly 110.

[0108] The inner surface refers to the surface of the tapered guide section 122211 near axis A.

[0109] In some embodiments, the inner diameter of the tapered inner surface M gradually increases from the end furthest from the stator assembly to the end closest to the stator assembly. With this configuration, when wastewater adheres to the tapered guide section, the wastewater can be flung out along the inclined inner surface under the action of inertial force (centrifugal force).

[0110] In some embodiments, the tapered guide portion 122211 is in the shape of a hollow frustum cone, and its axis coincides with the axis A of the rotating shaft 121. The end of the tapered guide portion 122211 closer to the stator assembly 110 is further away from the axis A than the end further away from the stator assembly 110, that is, the inner diameter of the tapered guide portion 122211 is increased.

[0111] In some embodiments, the outer surface of the tapered guide portion 122211 is tapered, and the outer surface is the side opposite to the inner surface M, that is, the surface of the tapered guide portion 122211 away from the axis A. The outer diameter of the tapered shape increases from the end away from the stator assembly 110 to the end closer to the stator assembly 110. With this configuration, the outer surface and the inner surface M form a hollow frustum-shaped tapered guide portion 122211.

[0112] Since the outer surface of the conical guide section 122211 is inclined to the first direction X (that is, the angle between the surface of the conical guide section 122211 and the first direction X is between 0° and 90°), the conical guide section 122211 can use the centrifugal force generated by the rotation of the driven section 122 to throw out the sewage attached to it.

[0113] In some embodiments, the tapered guide portion 122211 surrounds the liquid drainage portion 131.

[0114] In some embodiments of this specification, by providing a tapered guide section, wastewater can be ejected, preventing wastewater from entering the motor and thus increasing the motor's waterproof performance.

[0115] In some embodiments, the taper of the outer surface of the tapered guide portion 122211 is 30° to 80°. In some embodiments, the taper of the outer surface of the tapered guide portion 122211 is 40° to 70°. In some embodiments, the taper of the outer surface of the tapered guide portion 122211 is 45° to 65°. In some embodiments, the taper of the outer surface of the tapered guide portion 122211 is 45° to 60°. In some embodiments, the taper of the outer surface of the tapered guide portion 122211 is 50°. The taper is the angle between the outer surface of the tapered guide portion 122211 and the axis A. It should be noted that different tapers of the tapered guide portion 122211 result in different directions in which the wastewater is ejected.

[0116] In some embodiments of the specification, by limiting the taper of the conical guide section, the direction in which the sewage is thrown out can be controlled, thus preventing sewage from entering the motor.

[0117] In some embodiments, the tapered guide portion 122211 has a dimension of 0.5 mm to 4.5 mm along the first direction X. In some embodiments, the tapered guide portion 122211 has a dimension of 1 mm to 4 mm along the first direction X. In some embodiments, the tapered guide portion 122211 has a dimension of 2 mm to 3.5 mm along the first direction X. In some embodiments, the tapered guide portion 122211 has a dimension of 2.5 mm to 3 mm along the first direction X. In some embodiments, the tapered guide portion 122211 has a dimension of 2.75 mm along the first direction X. The length of the tapered guide portion 122211 along the first direction X can be understood as the length of the projection of the tapered guide portion 122211 onto the first direction X. For information on the dimension W of the tapered guide portion 122211 along the first direction X, please refer to [reference needed]. Figure 7 .

[0118] In some embodiments of the specification, by limiting the length of the tapered guide portion along the first direction, it can be ensured that the tapered guide portion can effectively cover the liquid drainage portion, and on the other hand, it can be ensured that other components have sufficient installation space.

[0119] In some embodiments, the outer diameter of the tapered flow guide 122211 near the stator assembly 110 is 28mm to 38mm. In some embodiments, the outer diameter of the tapered flow guide 122211 near the stator assembly 110 is 30mm to 35mm. In some embodiments, the outer diameter of the tapered flow guide 122211 near the stator assembly 110 is 31mm to 34mm. In some embodiments, the outer diameter of the tapered flow guide 122211 near the stator assembly 110 is 33mm.

[0120] It is understandable that, given a constant mass of wastewater and a constant rotational speed of the shaft, the larger the outer diameter of a certain position on the conical guide section, the greater the centrifugal force experienced by the wastewater at that position. In some embodiments of the specification, by limiting the outer diameter of the end of the conical guide section closest to the stator assembly, it can be ensured that the conical guide section can effectively cover the liquid drainage section, and that the wastewater at the end of the conical guide section away from the follower 122 can receive sufficient centrifugal force, thereby preventing wastewater from flowing into the space between the conical guide section and the liquid drainage section.

[0121] Figure 7 This is a schematic cross-sectional view of a tapered guide section having the same taper, as shown in some embodiments of this specification. Figure 8 This is a schematic cross-sectional view of a tapered guide section with different tapers, as shown in some embodiments of this specification.

[0122] In some embodiments, the tapered guide portion 122211 includes a plurality of tapered segments with different tapers, the taper of which increases from the end away from the stator assembly 110 to the end closer to the stator assembly 110. A tapered segment refers to a continuous segment on the tapered guide portion 122211 that has the same taper.

[0123] For example only, such as Figure 7 As shown, the first conical guide section 122211-1 includes a conical segment 122211-1a, and the taper of the conical segment 122211-1a is... ;like Figure 8 As shown, the second conical guide section 122211-2 includes a first conical segment 122211-2b and a second conical segment 122211-2c. The taper of the first conical segment 122211-2b is... The taper of the second conical segment 122211-2c is ,and < Since the outer diameter of the first tapered guide section 122211-1 and the second tapered guide section 122211-2 is R at the end near the stator assembly 110 and r at the end away from the stator assembly 110, therefore < < .

[0124] Compared to conical segment 122211-1a, the first conical segment 122211-2b has a smaller taper. At the same position projected in the first direction X, the outer diameter of the first conical segment 122211-2b is smaller, resulting in weaker centrifugal force. Since the centrifugal force points perpendicularly to the axis A away from the rotation axis 121 during rotation, the component of the centrifugal force perpendicular to the surface of the first conical segment 122211-2b is smaller. This allows the wastewater to adhere more tightly to the surface of the first conical segment 122211-2b, increasing friction and making premature slippage less likely. When the wastewater enters the second conical segment 122211-2c, the more inclined conical surface can provide acceleration along the inclined plane, ensuring that the wastewater reaches its peak velocity before exiting the second conical segment 122211-2c. In other words, compared to the first conical guide section 122211-1, the second conical guide section 122211-2 can throw the wastewater further.

[0125] In some embodiments of this specification, by providing multiple conical segments, and in a first direction, the taper of the conical segments gradually increases from the end away from the stator assembly to the end closer to the stator assembly, the sewage can be accelerated in segments, so that the sewage can have sufficient speed at the end of the conical guide near the stator assembly, thereby allowing the sewage to travel further.

[0126] In some embodiments, one end of the tapered guide portion 122211 near the stator assembly 110 protrudes along the first direction X from the outer edge of the liquid guide portion 131 near the stator assembly 110.

[0127] In some embodiments, the end of the tapered guide section 122211 near the stator assembly 110 covers the second blocking section 133. This arrangement prevents wastewater ejected from the tapered guide section 122211 from entering the space between the tapered guide section 122211 and the second annular guide groove 1311, thereby enhancing the waterproof effect of the motor.

[0128] In some embodiments, such as Figure 4B As shown, the flow guiding structure 12221 includes a first annular flow guiding groove 122212, and the opening of the first annular flow guiding groove 122212 faces away from the rotating shaft 121.

[0129] The first annular guide channel 122212 is used to collect and discharge sewage from the guide structure 12221. As an example only, the first annular guide channel 122212 can be as follows: Figure 4B The V-shaped groove shown. In other embodiments, the first annular guide groove 122212 can also be a groove of other shapes, such as a planar shape, a convex shape, etc.

[0130] In some embodiments, when there is sewage in the flow guiding structure 12221, the sewage can flow along the gravity direction Y through the first annular flow guiding groove 122212 to the gap between the first annular flow guiding groove 122212 and the housing 114 under the action of gravity, and then flow out of the motor 100 through the fluid outlet 111.

[0131] In some embodiments of this specification, by providing a first annular guide groove, sewage can be further prevented from flowing into the rotor and stator components inside the motor, thereby increasing the motor's waterproof effect.

[0132] In some embodiments, such as Figure 4B As shown, the flow guiding structure 12221 includes a distal cone 122213, which is connected to the end of the conical flow guiding section 122211 away from the stator assembly 110. The distal cone 122213 and the conical flow guiding section 122211 form a first annular flow guiding groove 122212.

[0133] The distal cone 122213 is a structure located between the tapered guide portion 122211 and the follower body 1221. In some embodiments, the end of the distal cone 122213 near the stator assembly 110 is connected to the end of the tapered guide portion 122211 away from the stator assembly 110, and the end of the distal cone 122213 away from the stator assembly 110 can be connected to the end of the follower body 1221 near the stator assembly 110.

[0134] In some embodiments, such as Figure 4B As shown, from the end away from the stator assembly 110 towards the end closer to the stator assembly 110, the outer diameter of the distal cone 122213 decreases, which can make the opening direction of the first angle between the outer cone surface of the distal cone 122213 and the first direction X opposite to the opening direction of the second angle between the outer cone surface of the conical guide portion 122211 and the first direction X, thereby forming a V-shaped first annular guide groove 122212. In some embodiments, the V-angle of the V-shaped first annular guide groove 122212 (i.e., the angle formed by the conical guide portion 122211 and the distal cone 122213) is 60°~100°. In some embodiments, the V-angle of the V-shaped first annular guide groove 122212 is 70°~90°. In some embodiments, the V-angle of the V-shaped first annular guide groove 122212 is 75°~85°. In some embodiments, the V-angle of the V-shaped first annular guide groove 122212 is 80°. The angle bisector of a V-shaped angle can be perpendicular or approximately perpendicular to the first direction X.

[0135] In some embodiments of this specification, by providing a distal cone with a gradually decreasing outer diameter, a first annular guide groove can be formed between the distal cone and the conical guide section, which can prevent sewage from entering the motor and increase the motor's waterproof performance.

[0136] In some embodiments, there are multiple tapered guide sections 122211, which are spaced apart. The spaced arrangement can be understood as the multiple tapered guide sections 122211 being arranged along a first direction X in a preset order (e.g., in descending order of the maximum outer diameter of the tapered guide sections 122211) and a preset distance.

[0137] In some embodiments, the maximum outer diameter of the plurality of tapered guide portions 122211 increases sequentially from the end away from the stator assembly 110 to the end closer to the stator assembly 110.

[0138] In some embodiments, each of the plurality of tapered guide sections 122211 may include a tapered segment. In some embodiments, with Figure 8Similarly, each of the multiple tapered guide sections 122211 may also include multiple tapered segments.

[0139] In some embodiments of this specification, multiple conical guide sections are provided, and the maximum outer diameter of the multiple conical guide sections decreases sequentially. This ensures that the wastewater thrown out by the conical guide section away from the stator assembly enters the first annular guide groove formed by the conical guide section close to the stator assembly, thereby preventing wastewater from entering the motor and further improving the drainage capacity of the guide ring.

[0140] In some embodiments, such as Figure 4B As shown, the flow guide ring 1222 includes a baffle 12222, which is circumferentially protruding from the inner side of the flow guide ring 122.

[0141] The baffle 12222 is used to prevent liquid in the liquid guide section 131 from entering the position where the driven member 122 and the stator assembly 110 are connected via the rotating shaft 121. The inner side refers to the side of the guide ring 1222 near the rotating shaft 121. In some embodiments, the connecting distal tapered portion 122213 of the baffle 12222 is located near the stator assembly 110, and the tapered guide section 122211 is located away from the stator assembly 110. The side of the baffle 12222 near the rotating shaft 121 corresponds to the side of the first blocking portion 132 away from the driven member 122.

[0142] In some embodiments of this specification, by providing a baffle, liquid in the liquid drainage section can be prevented from entering the space between the driven member and the stator assembly, thereby increasing the waterproof performance of the motor.

[0143] In some embodiments, along the first direction X, the baffle 1222 does not extend beyond the end of the guide member 130 near the follower 122.

[0144] In some embodiments, compared to the projection of the end of the first blocking portion 132 near the follower 122 in the first direction X, the projection of the end of the baffle 1222 away from the stator assembly 110 in the first direction X is further away from the follower body 1222. This arrangement can improve the effect of the baffle 1222 in blocking liquid and prevent liquid in the liquid drainage portion 131 from entering the space between the follower 122 and the stator assembly 110.

[0145] In some embodiments, a first blocking portion 132 is provided at one end of the guide member 130 near the driven member 122, and the baffle 1222 and the first blocking portion 132 are positioned correspondingly along the first direction X. This corresponding arrangement can be understood as the side of the baffle 12222 near the rotating shaft 121 facing the side of the first blocking portion 132 away from the rotating shaft 121, and the projections of the baffle 12222 and the first blocking portion 132 in the first direction X coincide or partially coincide. This arrangement improves the liquid-blocking effect of the baffle 1222, preventing liquid in the liquid guide portion 131 from entering the space between the driven member 122 and the stator assembly 110.

[0146] For example, when the motor 100 operates in an environment with external liquid, the liquid outside the motor 100 flows onto and adheres to the driven member 122. When the rotor assembly 120 rotates, it drives the driven member 122 to rotate. Most of the liquid adhering to the driven member 122 near the stator assembly 110 is detached from the driven member 122 and enters the guide channel 1143 under the action of inertial force (i.e., centrifugal force) along the guide structure 12221 of the guide ring 1222. The remaining liquid adhering to the driven member 122... The liquid may pass through the guide ring 1222 in the direction of the first direction X toward the stator assembly 110 and enter the gap between the follower 122 and the guide member 130, and be blocked by the first blocking part 132. Thus, it cannot flow into the gap between the follower 122 and the stator assembly 110. Under the action of centrifugal force, it is guided into the guide channel 1143 through the liquid guide part 131. The liquid in the guide channel 1143 is guided out. Thus, non-contact waterproofing between the stator assembly 110 and the rotor assembly 120 is achieved.

[0147] In some embodiments, such as Figure 2 and Figure 3 As shown, the stator assembly 110 includes a stator core 112 and a winding, the housing 114 includes a first housing portion, the winding 113 is wound in the stator core 112, and at least a portion of the stator core 112 is located in the first housing portion.

[0148] The stator core 112 supports the winding 113. In some embodiments, the stator core 112 is disposed inside the housing 114. In some embodiments, a first cavity 1121 for accommodating the shaft 121 and a second cavity 1122 for accommodating the winding 113 may be formed inside the stator core 112. In some embodiments, the second cavity 1122 is a sealed space. For example, the first housing portion may seal the stator assembly 110, making the second cavity 1122 a sealed space. Alternatively, the first housing portion and the stator core 112 may cooperate to seal the stator assembly 110, making the second cavity 1122 a sealed space.

[0149] In some embodiments, the stator core 112 includes a stator core body and a plurality of teeth. The stator core body is a cylindrical body, and the interior of the cylindrical body is a first cavity 1121. After the motor is assembled, the axis of the cylindrical body coincides with the axis A of the rotating shaft 121 in three-dimensional space. The plurality of teeth are evenly distributed on the surface of the stator core body near the axis (i.e., the inner surface of the stator core 112) or away from the axis (i.e., the outer surface of the stator core 112), and grooves are formed between the teeth, which constitute a second cavity 1122. In some embodiments, the stator core 112 may also be provided with a plurality of channels for guiding and accommodating wires.

[0150] Winding 113 refers to the wire bundle wound around the stator core 112. In some embodiments, winding 113 is disposed in slots and wound around teeth. In some embodiments, after three-phase alternating current is applied to winding 113, windings 113 with the same phase difference can generate alternating magnetic fields, and multiple alternating magnetic fields can be combined into a rotating magnetic field in three-dimensional space, which drives the rotor assembly to rotate.

[0151] The first housing portion is used to encapsulate the stator assembly 110. The first housing portion can directly contact and connect with the stator core. In some embodiments, the first housing portion 1141-1 is disposed on the outer surface of the stator core 112. In some embodiments, the first housing portions 1141-2 and 1141-3 are disposed at the end of the stator core 112 away from the follower 122 and the end of the stator core 112 near the follower 122, respectively. In some embodiments, at least a portion of the outer surface of the stator assembly 110 is not covered by the first housing portion; for example, the uncovered portion can serve as a heat dissipation portion for heat dissipation.

[0152] In some embodiments, the housing 114 is integrally formed. This configuration ensures the precision and consistency of the stator assembly 110, reduces high-frequency vibrations during motor 100 operation, and thus reduces noise.

[0153] In some embodiments of this specification, by providing a first housing, the stator core, windings, and shaft can be integrated into a single package, avoiding excessive vibration and noise during motor operation due to inconsistent assembly.

[0154] In some embodiments, the guide member 130 is sleeved on the end of the first housing near the driven member 122. This arrangement facilitates the fixation of the guide member 130 and ensures that the guide member 130 can completely cover the first housing, preventing liquid from entering the end of the first housing near the driven member 122.

[0155] In some embodiments, the housing 114 includes a second housing portion 1142, which is spaced apart from the first housing portion, and a flow channel 1143 is formed between the second housing portion 1142 and the first housing portion.

[0156] The second shell 1142 is disposed outside the first shell and is used to form a flow channel 1143 between the second and first shells.

[0157] In some embodiments, the second housing portion 1142 may be connected to the flow guide 130, and the first housing portion 1141-3 near the end of the rotating shaft 121 close to the driven member 122 is connected to the flow guide 130. There is a gap between the second housing portion 1142 and the first housing portions 1141-1 and 1141-3, forming a flow guide channel 1143. In some embodiments, the positions where the second housing portion 1142 and the first housing portion 1141-1 are formed in the flow guide channel 1143 may be fluid outlets 111.

[0158] In some embodiments, when the cleaning robot is cleaning, airflow can enter from the end of the guide channel 1143 near the follower 122 and exit from the end of the guide channel 1143 away from the follower 122. Dirt can be sucked into the robot's interior through the guide channel 1143 along with the airflow.

[0159] In some embodiments of this specification, by providing a second shell and forming a flow channel between the second shell and the first shell, the sweeping robot can be equipped with the function of sucking up dirt and sewage.

[0160] In some embodiments, such as Figure 3 As shown, the flow guide 130 is disposed between the second shell 1142 and the first shell, and the liquid drainage part 131 is connected to the flow guide channel 1143.

[0161] In some embodiments, the flow guide 130 is disposed between the second housing portion 1142 and the first housing portion 1141-3. Since the flow guide 130 is disposed in non-contact with the flow guiding structure 12221, the liquid drainage portion 131 communicates with the flow guiding channel 1143.

[0162] In some embodiments of this specification, since the air discharged from the guide channel may contain liquid, the liquid may fall into the liquid drain section. By connecting the liquid drain section to the guide channel, it can be ensured that the liquid can be discharged from the liquid drain section through both ends of the guide channel.

[0163] In some embodiments, such as Figure 2 As shown, the flow guide 130 includes a noise reduction part, which is disposed within the flow guide channel 1143.

[0164] The noise reduction unit 134 is used to reduce the noise of airflow. In some embodiments, the noise reduction unit 134 is disposed at a location in the airflow channel 1143 where turbulence is likely to occur. For example, the noise reduction unit 134 is disposed at the narrowest point of the airflow channel 1143.

[0165] In some embodiments, the noise reduction unit 134 includes a plurality of guide vanes 1341 arranged circumferentially along the guide member 130.

[0166] The guide vanes 1341 are used to guide the direction of airflow. In some embodiments, the guide vanes 1341 can optimize the distribution of the airflow field, thereby reducing turbulence and achieving noise reduction. The number of guide vanes 1341 is set based on actual needs (such as noise reduction requirements and airflow field distribution).

[0167] In some embodiments of this specification, due to the narrowness of the guide channel, turbulence is easily generated when airflow passes through it, leading to noise. By incorporating a noise reduction section with multiple guide vanes, the airflow field distribution can be optimized, airflow noise can be reduced, and the user experience can be improved.

[0168] In some embodiments, the end of the follower 122 near the stator assembly 110 is disposed within the flow channel 1143.

[0169] In some embodiments, the end of the guide ring 1222 away from the driven member 122 or the entire guide ring 1222 is disposed within the guide channel 1143. This arrangement ensures that the wastewater thrown out by the guide ring 1222 can enter the guide channel 1143 and then be discharged.

[0170] In some embodiments, the motor shaft rotates at speeds ranging from 80,000 RPM to 100,000 RPM during operation. That is, the motor is a high-speed motor and generates a significant amount of heat during operation. Therefore, a heat dissipation design is required.

[0171] In some embodiments, such as Figure 3 As shown, the first housing includes a first molding portion 11411, which at least partially covers the stator assembly 110.

[0172] The first molding portion 11411 is used to mold the end of the stator assembly 110 away from the follower 122. In some embodiments, the first molding portion 11411 covers the end of the stator assembly 110 away from the follower 122 and a portion of the outer surface of the stator assembly 110. The covering may include a wrap or the like.

[0173] In some embodiments of this specification, when the motor is in operation, the stator core generates a large amount of heat. The first plastic encapsulation portion at least partially covers the stator assembly, which can ensure the heat dissipation of the stator assembly.

[0174] In some embodiments, the material of the first molding portion 11411 includes a bulk molding compound (BMC). It is worth noting that, since the motor generates a large amount of impact and heat during operation, the bulk molding compound possesses excellent structural strength, thermal stability, and thermal conductivity, which not only ensures the stability of motor operation but also increases heat dissipation.

[0175] In other embodiments, the first molding portion 11411 may also be made of any material with similar properties. For example, sheet molding compound (SMC), etc.

[0176] In some embodiments, the outer surface of the stator assembly 110 includes a first portion not covered by the first molding compound 11411, and the area of ​​the first portion is not less than a first threshold in ratio to the total area of ​​the outer surface of the stator assembly 110. The first threshold can be set as needed. The first threshold can be set as close to 100% as possible. For example, the first threshold can be greater than 80%. Or, for example, the first threshold can be greater than 90%. In some embodiments, the first threshold can be 100%.

[0177] The outer side of the stator assembly 110 is the side of the stator assembly 110 that is away from the rotating shaft 121.

[0178] The first part 1123 is the outer side of the designated sub-component 110 that is not covered by the first molding part 11411.

[0179] In some embodiments of this specification, by limiting the minimum ratio of the area of ​​the first part to the total area of ​​the outer surface of the stator assembly, the heat dissipation effect of the stator core can be guaranteed, and the motor can be prevented from malfunctioning due to overheating of the stator core.

[0180] In some embodiments, the stator assembly 110 includes a heat dissipation section, which is positioned corresponding to the first part.

[0181] The heat sink is used to reduce the temperature of the stator assembly. This can be understood as either the heat sink being located in the same position as the first part, or the heat sink covering part or all of the first part.

[0182] In some embodiments, the heat dissipation portion can be formed in various ways. For example, the heat dissipation portion can be formed directly from the first portion. Another example is that the heat dissipation portion can be a heat-dissipating material disposed on the surface of the first portion.

[0183] In some embodiments of this specification, by providing a heat dissipation section, the heat dissipation effect of the stator core can be ensured, and the motor can be prevented from malfunctioning due to overheating of the stator core.

[0184] In some embodiments, the first part constitutes a heat dissipation part.

[0185] In some embodiments, the first part may be exposed in the flow channel 1143 after surface treatment (such as surface plating to avoid corrosion or damage to the first part 1123), that is, the first part directly realizes the heat dissipation function.

[0186] In some embodiments of this specification, the first part directly constitutes a heat dissipation part, which can maximize the heat dissipation effect of the stator core.

[0187] In some embodiments, the stator assembly 110 includes a heat dissipation layer connected to a first molding portion 11411, and the heat dissipation layer covers the first portion.

[0188] The heat dissipation layer refers to the layered structure composed of heat dissipation material covering the first part.

[0189] In some embodiments, the heat dissipation layer may be made of a material with high thermal conductivity. For example, the heat dissipation layer may be made of a metal, non-metal, or the like with a thermal conductivity higher than a preset thermal conductivity. The preset thermal conductivity can be set as needed. In some embodiments, the material of the heat dissipation layer includes at least one of copper, aluminum alloy, graphite, and thermal grease.

[0190] In some embodiments, the thermal conductivity of the heat dissipation layer is greater than that of the housing 114.

[0191] In some embodiments of this specification, compared to the first method of directly forming a heat dissipation part, the heat dissipation layer provides better protection for the stator assembly, enabling the motor to be used in more severe environments.

[0192] In some embodiments, such as Figure 3 As shown, the stator assembly 110 includes a second molding portion 11412, which covers the outer side of the stator assembly 110. A first molding portion 11411 partially covers the second molding portion 11412, and the thermal conductivity of the second molding portion 11412 is greater than that of the first molding portion 11411.

[0193] The second encapsulation portion 11412 is used to encapsulate the stator assembly 110. In some embodiments, the second encapsulation portion 11412 covers the stator assembly 110, and the first encapsulation portion 11411 partially covers the second encapsulation portion 11412 at one end near the follower 122.

[0194] In some embodiments, the second molding portion 11412 may cover the first portion, that is, the second molding portion may constitute a heat dissipation portion.

[0195] In some embodiments, the thermal conductivity of the second encapsulation portion 11412 is greater than that of the first encapsulation portion 11411, so as to ensure the heat dissipation effect of the outer surface of the stator core 112.

[0196] In some embodiments, the material of the second molding portion 11412 includes epoxy molding compound (EMC). It is worth noting that epoxy resin has excellent heat resistance and thermal conductivity, enabling cooling while adapting to the high-temperature environment of the motor during operation.

[0197] In other embodiments, the second encapsulation portion 11412 may also be made of any material with similar properties.

[0198] In some embodiments of this specification, since epoxy molding compound can be adapted to any shape, the iron core is first covered with epoxy molding compound, and then the first molding part is covered with epoxy molding compound, which can be molded into a more regular shape, so as to reduce the difficulty of molding the first molding part.

[0199] In some embodiments, a flow channel 1143 is provided in the housing 114, and the heat dissipation part is exposed in the flow channel 1143. The rotation of the rotor assembly 120 generates airflow through the heat dissipation part. The airflow generated by the rotation of the rotor assembly 120 enters the flow channel 1143 and flows from the end near the driven member 122 to the end away from the driven member 122 in the flow channel 1143. Exposing the heat dissipation part in the flow channel 1143 facilitates the airflow to carry away heat and achieves rapid heat dissipation.

[0200] In some embodiments, when the motor is in operation, the airflow velocity in the guide channel 1143 is not lower than a second threshold. The second threshold can be set as needed. Taking a motor with a rated power of 80W as an example, when the motor is in operation, the airflow velocity in the guide channel 1143 is not lower than 11m / s, for example, the airflow velocity can be 11~15m / s.

[0201] In some embodiments of this specification, the heat dissipation effect of the motor can be guaranteed by limiting the minimum airflow velocity.

[0202] It is worth noting that the heat dissipation effect of the motor is positively correlated with the area of ​​the heat dissipation unit and the airflow velocity within the guide channel. In some embodiments, the larger the area of ​​the heat dissipation unit, the lower the airflow velocity can be set; conversely, the smaller the area of ​​the heat dissipation unit, the higher the airflow velocity can be set. Determining the airflow velocity based on the area of ​​the heat dissipation unit can minimize energy consumption while ensuring effective heat dissipation.

[0203] For example, encapsulating the motor 100 with plastic sealant reduces assembly difficulty and achieves external waterproofing. However, the stator core 112 generates a lot of heat during operation. By ensuring that the unencapsulated portion of the stator assembly 110 has sufficient area for heat dissipation, the heat dissipation effect of the stator core 112 can be guaranteed. Furthermore, by providing a heat dissipation part in the motor 100 and exposing the heat dissipation part in the heat conduction channel 1143, the airflow in the heat conduction channel 1143 is used to enhance the heat dissipation effect.

[0204] In some embodiments, the first molding portion 11411 includes a mounting hole 114111, the diameter of the end of the mounting hole 114111 away from the follower 122 is larger than the diameter of the end of the mounting hole 114111 near the follower 122.

[0205] Mounting hole 114111 is used to mount shaft 121. In some embodiments, the diameter of the end of mounting hole 114111 away from follower 122 is larger than the diameter of the end of mounting hole 114111 near follower 122, which can improve the ease of demolding of first molding part 11411 during manufacturing process, thereby increasing the production efficiency of first molding part 11411.

[0206] Figure 9 This is a partial structural schematic diagram of the motor according to some embodiments of this specification.

[0207] In some embodiments, such as Figure 9 As shown, the stator assembly 110 includes a circuit assembly 115. A receiving portion is provided at the end of the first encapsulated portion 11411 away from the follower 122, and the circuit assembly 115 can be disposed in the receiving portion.

[0208] The circuit assembly 115 is used to supply power to the motor. The receiving portion is used to receive the circuit assembly 115. In some embodiments, the receiving portion is disposed at the end of the first encapsulation portion 11411 away from the follower 122.

[0209] In some embodiments, when a non-assembled stator assembly 110 is used, the circuit assembly 115 can be pre-embedded in the receiving portion and integrally formed with the stator assembly 110.

[0210] In some embodiments, the circuit assembly 115 includes a plug terminal 1151, which is exposed outside the first encapsulation portion 11411 and is a waterproof terminal.

[0211] The plug terminal 1151 is used to connect to an external power source. In some embodiments, the plug terminal 1151 is exposed outside the first plastic encapsulation portion 11411, which can be understood as: the plug terminal 1151 and the projection of the first plastic encapsulation portion 11411 in the first direction X do not at least partially coincide. In some embodiments, the waterproof plug terminal 1151 can be waterproofly connected to an external power source.

[0212] In the embodiments described in this specification, electronic components can be protected by providing a receiving portion; waterproof electrical connection of the motor can be achieved by providing electronic components including plug terminals.

[0213] This specification provides one or more embodiments of an electric motor, the electric motor including: a stator assembly 110 and a rotor assembly 120, the stator assembly 110 including a stator core 112, a winding 113 and a housing 114, the housing 114 including a first housing portion, the winding 113 being wound in the stator core 112, and at least a portion of the first housing portion encapsulating the stator core 112 and the winding 113; the rotor assembly 120 being rotatable relative to the stator assembly 110, the rotor assembly 120 including a shaft 121 and a follower 122 connected to the shaft 121; wherein, the first housing portion includes a first encapsulation portion 11411, at least a portion of the first encapsulation portion 11411 covering the stator core 112, the outer surface of the stator core 112 including a first portion not covered by the first encapsulation portion 11411, the ratio of the area of ​​the first portion to the total area of ​​the outer surface of the stator core 112 not less than a first threshold.

[0214] For details about the components mentioned above, please refer to the relevant descriptions above.

[0215] In some embodiments of this specification, the use of plastic encapsulation technology can not only achieve effective waterproofing of the stator assembly without the need for a flow guiding component, but also eliminate the need for assembly of the stator assembly, thereby avoiding vibration and noise caused by inconsistent assembly.

[0216] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0217] Finally, it should be understood that the embodiments in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments in this specification are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments in this specification are not limited to those explicitly described and illustrated herein.

Claims

1. An electric motor, characterized in that, include: case; The stator assembly is disposed within the housing; A rotor assembly is disposed within the housing and is rotatable relative to the stator assembly. The rotor assembly includes a shaft and a driven member connected to the shaft. The driven member includes a driven member body and a flow guide ring. The flow guide ring is connected to one end of the driven member body near the stator assembly and includes at least one flow guide structure. When the rotor assembly rotates, at least a portion of the liquid on the driven member is dislodged from the driven member along the flow guide structure under the action of inertial force.

2. The motor as described in claim 1, characterized in that, The at least one flow guiding structure includes an arc-shaped flow guiding portion or an inclined flow guiding portion, which is covered on the end of the flow guiding member near the driven member. From the end away from the stator assembly to the end near the stator assembly, the inner side of the arc-shaped flow guiding portion or the inclined flow guiding portion gradually moves away from the flow guiding member and towards the end near the driven member.

3. The motor as described in claim 1, characterized in that, The at least one flow guiding structure includes a tapered flow guiding portion, the inner surface of which is tapered, and the tapered flow guiding portion is disposed at one end of the flow guiding member near the driven member. The inner diameter of the tapered flow guiding portion increases from the end away from the stator assembly to the end near the stator assembly.

4. The motor as described in claim 3, characterized in that, The outer surface of the tapered guide is tapered, and the outer diameter of the tapered shape increases from the end away from the stator assembly to the end closer to the stator assembly.

5. The motor as described in claim 3, characterized in that, The flow guiding structure includes a first annular flow guiding groove, the opening of which faces away from the rotating shaft.

6. The motor as described in claim 5, characterized in that, The flow guiding structure includes a distal cone portion, which is connected to the end of the tapered flow guiding portion away from the stator assembly, and the distal cone portion and the tapered flow guiding portion form the first annular flow guiding groove.

7. The motor as described in claim 6, characterized in that, The outer diameter of the distal tapered portion decreases from the end furthest from the stator assembly toward the end closest to the stator assembly.

8. The motor as described in claim 1, characterized in that, The driven component body includes an impeller, the housing has a flow channel, at least a portion of the at least one flow channel is located within the flow channel, the housing also includes a fluid outlet, and the rotation of the impeller can generate an airflow within the flow channel toward the fluid outlet.

9. The motor as described in claim 8, characterized in that, The extension range of the flow guide channel along the first direction at least partially overlaps with the extension range of the stator assembly along the first direction.

10. The motor as described in claim 9, characterized in that, The fluid outlet is located in a first direction near the end of the stator assembly away from the rotor assembly.

11. The motor as described in claim 1, characterized in that, It also includes a flow guide connected to the stator assembly; the follower at least partially surrounds the flow guide, and the projections of the flow guide and the follower along a first direction at least partially overlap; the flow guide includes a liquid drainage portion; the stator assembly includes a fluid outlet; and the liquid drainage portion and the fluid outlet are in a communicating region.

12. The motor as described in claim 11, characterized in that, The driven member and the guide member are configured to be non-contact.

13. The motor as described in claim 11, characterized in that, The flow guide includes a first blocking portion, which is disposed on one end of the flow guide near the driven member.

14. The motor as described in claim 13, characterized in that, The first blocking portion includes a blocking surface facing the end of the stator assembly away from the driven member.

15. The motor as described in claim 13, characterized in that, The flow guide includes a second blocking portion, and the liquid guiding portion includes at least one second annular flow guide groove, with at least one second annular flow guide groove located between the first blocking portion and the second blocking portion.

16. The motor as described in claim 15, characterized in that, The dimension of the second blocking part in the direction perpendicular to the first direction is greater than the dimension of the first blocking part in the direction perpendicular to the first direction.

17. The motor as described in claim 15, characterized in that, At least one of the second annular guide channels is hydrophobic.

18. The motor as described in claim 3, characterized in that, The end of the tapered guide portion near the stator assembly protrudes along the first direction from the outer edge of the liquid guide portion near the stator assembly.

19. The motor as described in claim 11, characterized in that, The flow guide ring includes a baffle plate, which is circumferentially protruding from the inner side of the flow guide ring.

20. The motor as described in claim 19, characterized in that, Along the first direction, the baffle does not extend beyond the end of the guide member near the driven member.

21. The motor as described in claim 20, characterized in that, The guide member has a first blocking part at one end near the driven member, and the baffle is positioned corresponding to the first blocking part along the first direction.

22. The motor as described in claim 1, characterized in that, The stator assembly includes a stator core and a winding, the housing includes a first housing portion, the winding is wound in the stator core, and at least a portion of the stator core is located within the first housing portion.

23. The motor as described in claim 22, characterized in that, The flow guide is sleeved on the end of the first housing near the driven member.

24. The motor as described in claim 23, characterized in that, The housing includes a second housing portion, which is spaced apart from the first housing portion. A flow channel is formed between the second housing portion and the first housing portion, and the flow channel is connected to the fluid outlet.

25. The motor as described in claim 24, characterized in that, The flow guide is disposed between the second shell and the first shell, and the liquid drainage part is connected to the flow guide channel.

26. The motor as described in claim 25, characterized in that, The flow guide includes a noise reduction part, which is disposed within the flow guide channel.

27. The motor as described in claim 26, characterized in that, The noise reduction unit includes a plurality of guide vanes arranged circumferentially along the guide member.

28. The motor as described in claim 24, characterized in that, The driven member is disposed within the flow channel at one end near the stator assembly.

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