Motors and fans

Abstract

The present invention provides a motor and a fan, wherein the motor comprises: a stator assembly including a stator core and two sets of independent windings, a hollow channel being provided in the radial middle portion of the stator core, stator teeth being provided at both axial ends of the stator core, and the two sets of windings being respectively wound on the two sets of stator teeth; two independent rotor assemblies being coaxially arranged on opposite axial sides of the stator assembly and forming an axial air gap with the stator assembly, and being configured to rotate independently of each other; and two independent rotating shaft assemblies, the rotating shaft assemblies including a rotating shaft and a rotating support portion, the rotating support portion being at least partially accommodated in the hollow channel and sleeved on the rotating shaft, for supporting the rotating shaft and enabling the rotating shaft to rotate relative to the stator core, the two rotating shafts being coaxially connected to the two rotor assemblies, and protruding in the axial direction of the motor in a direction away from the stator core. The present application has significant advantages such as compact structure, strong practical functionality, easy installation, small axial size, and low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the field of fans, and in particular to a motor and a fan comprising the motor. Background Art

[0002] With the continuous improvement of quality of life, fans are also being asked to have more functional features, such as two coaxial fans with corresponding speeds and directions of rotation. Currently, two technologies are commonly used: one is to use two motors with opposite shafts, each connected to the two fans. This is more expensive and takes up a lot of axial space. The other is to use a single-axis motor and a gear mechanism to achieve two shafts at both ends, and to achieve a fixed ratio of speed and direction of rotation for the fans connected to the two shafts. This has limited functional diversity and is difficult to manufacture and install. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, an object of the present invention is to provide a motor.

[0004] Another object of the present invention is to provide a fan comprising the above motor.

[0005] In order to achieve the above-mentioned objectives, the technical solution of the first aspect of the present invention provides a motor, comprising: a stator assembly, comprising a stator core and two groups of independent windings, a hollow channel being provided in the radial middle portion of the stator core, and stator teeth protruding axially to the two ends of the stator core, the two groups of windings being respectively wound on the two groups of stator teeth; two independent rotor assemblies, coaxially arranged on the axial sides of the stator assembly facing away from each other, and forming an axial air gap with the stator assembly, and the two rotor assemblies are configured to rotate independently of each other; and two independent rotating shaft assemblies, the rotating shaft assembly comprising a rotating shaft and a rotating support portion, the rotating support portion being at least partially accommodated in the hollow channel and sleeved on the rotating shaft, for supporting the rotating shaft and making the rotating shaft suitable for rotating relative to the stator core, the two rotating shafts being coaxially connected to the two rotor assemblies respectively, and protruding in the axial direction of the motor in a direction away from the stator core.

[0006] The motor provided by the technical solution of the first aspect of the present invention utilizes a stator assembly in conjunction with two independent rotor assemblies and two independent rotating shaft assemblies to achieve dual-power independent output from a motor, and can drive two fans to rotate independently at their respective speeds and directions without interfering with each other. Compared to the solution in which two motors are connected to two fans with their back-to-back shafts, at least one stator assembly is eliminated, the axial size of the fan is reduced, and the cost of the fan is reduced; compared to the solution in which a single-axis motor and a gear mechanism are combined to achieve shaft extensions at both ends, the two fans are able to rotate at any speed and in any direction, which is highly practical and functional, significantly improving the diversification of the fan's functionality, while also eliminating the gear mechanism and reducing the difficulty of manufacturing and installing the product.

[0007] Specifically, the motor comprises a stator assembly, two independent rotor assemblies, and two independent rotating shaft assemblies. The stator assembly includes a stator core and two independent windings. Stator teeth are provided at both axial ends of the stator core. The two sets of stator teeth extend axially toward each other, allowing the two windings to be wound, ensuring that the two windings can operate independently of each other. A hollow channel is provided in the radial center of the stator core, providing favorable axial installation space for the rotating shaft assemblies. Portions of the two rotating shaft assemblies can be inserted into the hollow channel, further reducing the axial dimensions of the motor. The two rotor assemblies are coaxially arranged on opposite axial sides of the stator assembly, facing the two windings, forming an axial air gap with the stator assembly. This ensures that the two rotor assemblies do not interfere with each other and rotate independently. The rotating shaft assembly includes a rotating shaft and a rotating support portion. The rotating support portion is partially or fully accommodated within the hollow channel and is mounted on the rotating shaft to ensure the stability of the rotating shaft position and stability during rotation. The rotating shaft is coaxially connected to the rotor assembly, realizing the power output function of the motor. The two rotating shaft assemblies are independent of each other and are coaxially connected to the corresponding rotor assemblies, rotating synchronously with the corresponding rotor assemblies. The two rotating shaft assemblies can protrude to either side of the motor's axial direction, or they can protrude to the same side of the motor's axial direction. Since the two windings of the stator assembly are independent of each other, the two rotor assemblies are independent of each other, and the two rotating shaft assemblies are independent of each other, two independent torques can be output at both axial ends of the motor, which is equivalent to using a single motor to achieve the functions of two independent motors. Therefore, the motor has the significant advantages of a compact structure, strong practical functionality, easy installation, small axial dimensions, and low manufacturing cost.

[0008] In addition, the motor in the above technical solution provided by the present invention may also have the following additional technical features:

[0009] In the above technical solution, the rotation support portion includes at least one bearing.

[0010] The rotational support includes at least one bearing. Using a bearing to support the rotating shaft significantly improves the shaft's reliability. Of course, the rotational support is not limited to bearings and can also be other structures. For example, multiple needle rollers can be circumferentially arranged on the inner sidewall of the hollow channel to support the rotating shaft. Alternatively, multiple connecting rings can be axially arranged on the inner sidewall of the hollow channel, with the inner sidewalls of the connecting rings being smooth, to support the rotating shaft.

[0011] In the above technical solution, there are multiple bearings, and the multiple bearings are distributed at intervals on both sides of the axial direction of the rotor assembly along the length direction of the rotating shaft.

[0012] Multiple bearings are spaced apart along the length of the shaft to support multiple locations on the shaft, improving the reliability of the rotating support portion's support of the shaft, thereby further enhancing the operational reliability of the shaft assembly. Furthermore, multiple bearings are distributed axially on both sides of the corresponding rotor assembly, providing dispersed support for multiple locations on the shaft, thereby improving shaft support reliability and significantly reducing the risk of shaft tilt, thereby improving the operational reliability of the motor. Optionally, two bearings can be used, effectively improving the support reliability of the shaft assembly while reducing the number of components and saving production costs.

[0013] In the above technical solution, the motor further includes: two bearing covers, which are mounted in the hollow channel and fixedly connected to the stator core, and the two bearing covers are arranged back to back to support the corresponding bearings axially inward of the rotating shaft assembly.

[0014] Two bearing covers are arranged in the hollow channel to support the axially inner bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the inside of the motor). Since the two bearing covers are arranged back to back, they can play a good limiting role on the two rotating support parts, ensuring that the two rotating shaft assemblies and the stator assembly do not interfere with each other, and reducing the probability of the rotating shaft assembly shaking, tilting, shifting, etc., which is beneficial to improving the reliability of the motor. At the same time, it is also beneficial to improve the assembly accuracy of the rotating shaft assembly and more convenient installation; and the two bearing covers can act as separators, separating the rotating support parts of the two rotating shaft assemblies, thereby effectively preventing the two rotating shaft assemblies from interfering with each other, further improving the reliability of the two rotating shaft assemblies.

[0015] In the above technical solution, the shape of the bearing cover is adapted to that of the bearing, and the bearing is accommodated in the bearing cover and supported by the bearing cover.

[0016] The bearing cover is adapted to the bearing in form, so the bearings axially inward of the two rotating shaft assemblies can be sunk into the bearing cover, thereby obtaining effective support and limitation, further improving the reliability of the motor.

[0017] In the above technical solution, the open end of the bearing cover is provided with a flange extending radially outward.

[0018] The open end of the bearing cover is provided with a flange, which extends radially outward and can cooperate with the concave and convex part of the casing injected later to play a certain limiting role and prevent the bearing cover from axially moving relative to the stator core.

[0019] In the above technical solution, at least one notch is provided on the flange.

[0020] At least one notch is provided on the flange, and the notch can cooperate with the concave and convex surface of the housing to be injected later, thereby preventing the bearing cover from rotating circumferentially relative to the stator assembly, thereby improving the stability of the bearing cover. Optionally, there are multiple notches, and the multiple notches are distributed at intervals along the circumference of the flange.

[0021] In any of the above technical solutions, the two rotating shaft assemblies protrude along the axial direction of the motor toward both sides of the axial direction of the motor respectively.

[0022] The two rotating shaft assemblies protrude along the axial direction of the motor toward both sides of the axial direction of the motor, so that power can be output at both axial ends of the motor, and the power output at both ends of the motor does not interfere with each other, thereby enriching the functionality of the motor.

[0023] Of course, the two rotating shaft assemblies can also protrude along the axial direction of the motor toward the same axial side of the motor, so that one axial end of the motor can output two torques. In this case, the rotating shafts of the two rotating shaft assemblies can be nested.

[0024] In any of the above technical solutions, the stator core includes a stator yoke and a plurality of stator teeth arranged along the circumferential direction of the stator yoke, the plurality of stator teeth are assembled with the stator yoke to form the stator core, and the plurality of stator teeth protrude to the axial sides of the stator yoke to form two groups of stator teeth, and the two groups of windings are respectively wound on the stator teeth on the axial sides of the stator yoke.

[0025] This solution splits the stator core into a stator yoke and multiple stator teeth, which not only reduces the difficulty of machining the stator core but also reduces the difficulty of winding the two sets of windings. The stator yoke can be formed by laminating multiple stator stampings, and the stator teeth can also be formed by laminating multiple stator stampings. Of course, the stator core can also be a one-piece structure.

[0026] In the above technical solution, a through hole adapted to the bearing cover of the motor is provided in the radial middle portion of the stator yoke, and the through hole constitutes a part of the hollow channel of the stator core; and / or a slot is provided on the radial outer wall of the stator yoke, and a part of the stator tooth portion is embedded in the slot, so that the stator tooth portion is snap-fitted with the stator yoke.

[0027] Since the multiple stator teeth are arranged along the circumferential direction of the stator yoke, the multiple stator teeth enclose a certain hollow space. Therefore, a through hole is set in the radial middle part of the stator yoke. The through hole and the aforementioned hollow space form a hollow channel, which can provide a favorable axial installation space for the rotating shaft assembly, thereby shortening the axial size of the motor.

[0028] A clamping groove is provided on the radial outer side wall of the stator yoke, and the stator teeth can be clamped on the stator yoke by the clamping groove, thereby realizing the assembly of the stator yoke and the stator teeth. The structure is simple, and it is easy to process and assemble.

[0029] In the above technical solution, any of the stator tooth portions includes at least one stator tooth, and the stator tooth includes a tooth body and a tooth surface connected to one axial end of the tooth body and located on one axial side of the stator yoke portion. All tooth surfaces of any group of stator teeth are located in the same plane and perpendicular to the axis of the stator yoke portion.

[0030] Any stator tooth portion includes at least one stator tooth, which includes a tooth body and a tooth surface. The tooth surface is connected to the axial end of the tooth body away from the stator yoke portion, and is therefore located on one axial side of the stator yoke portion; all tooth surfaces of any group of stator teeth are located in the same plane and perpendicular to the axis of the stator yoke portion, ensuring that an axial air gap can be formed with the rotor assembly on this side.

[0031] In the above technical solution, the stator tooth portion includes two stator teeth, and a limiting step is provided on the tooth body of the stator tooth portion, and the limiting step abuts against the stator yoke portion to limit the axial movement of the stator tooth portion relative to the stator yoke portion.

[0032] A stator tooth section consists of two stator teeth, with their tooth surfaces located on opposite axial sides of the stator yoke, creating an axial air gap with the rotor assemblies on either side. Compared to a solution where a stator tooth section consists of only one stator tooth, this reduces the number of stator teeth and simplifies the assembly process. Alternatively, a stator tooth section can consist of only one stator tooth, with two stator teeth mounted in opposite directions on a single portion of the stator core to form two stator teeth.

[0033] In any of the above technical solutions, the rotor assembly includes a rotor disk coaxially connected to the corresponding rotating shaft and a permanent magnet mounted on the rotor disk, and the rotor disk includes, from the outside to the inside along its radial direction, an outer disk body and an inner disk body connected to the outer disk body, wherein the outer disk body is a disc-shaped structure, and the inner disk body is a disc-shaped structure or a conical structure.

[0034] The rotor assembly consists of a rotor disk and permanent magnets. The rotor disk serves as a mounting carrier for the permanent magnets and enables a coaxial connection between the rotor assembly and the rotating shaft. The permanent magnets are mounted on the rotor disk, generating a magnetic field that interacts with the stator assembly. The rotor disk's exterior is a disc-shaped structure, offering a relatively regular structure that facilitates machining and molding, as well as the arrangement of multiple permanent magnets. The interior of the disk is a disc-shaped or conical structure, facilitating the rational design of the rotor disk and rotating shaft assembly based on the specific product structure, providing space for the installation of other components.

[0035] In the above technical solution, the rotor disk and the corresponding rotating shaft are an integral structure formed by injection molding or welding; or, the rotor disk and the rotating shaft are threadedly connected or interference fit.

[0036] The shaft assembly includes a shaft, a rotor disk coaxially connected to the shaft and fixed together by injection molding or welding to form an integrated structure, or fixedly connected by threaded connection, interference fit, etc., effectively ensuring the reliability of the connection between the shaft and the rotor disk, thereby ensuring the reliability of the synchronous rotation of the shaft and the rotor assembly.

[0037] In the above technical solution, the permanent magnet is a circular or fan-shaped pie-shaped structure, and the number of the permanent magnets is multiple. The multiple permanent magnets are evenly distributed circumferentially on the axial surface of the stator yoke of the rotor disk facing the stator core to form an axial magnetic flux; the N poles and S poles of two adjacent permanent magnets are arranged alternately or in a Halbach array.

[0038] The permanent magnets are circular or fan-shaped, making them easy to arrange and reducing the motor's axial dimensions. Multiple permanent magnets are evenly distributed along the rotor disk's circumferential surface, facing the stator yoke, creating an axial magnetic flux between the rotor and stator assemblies. The north and south poles of adjacent permanent magnets can be arranged alternately or in a Halbach array, a configuration that can be adjusted based on product requirements.

[0039] In any of the above technical solutions, the motor further includes: an insulating frame mounted on the stator teeth; a mounting frame fixedly connected to the insulating frame; a plurality of pins inserted into the mounting frame, and the lead wires of the two groups of windings are fixedly connected to the plurality of pins.

[0040] The motor also includes an insulating frame, a mounting frame and multiple pins. The insulating frame is installed on the stator teeth to ensure the safety and reliability of the windings installed on the stator teeth. The mounting frame is fixedly connected to the insulating frame and is inserted with multiple pins. The lead wires of the two sets of windings are fixedly connected to the multiple pins, thereby leading the leads of the two sets of windings to a fixed and stable conductive carrier.

[0041] In the above technical solution, the mounting frame is an arc-shaped strip structure coaxial with the stator assembly, and the mounting frame and the plurality of pins are located radially outside the rotor assembly.

[0042] The mounting frame is an arc-shaped strip structure coaxial with the stator assembly, and the mounting frame and multiple pins are located radially outside the two rotor assemblies, making the structure of the motor relatively regular and not easy to interfere with the internal magnetic field of the motor, while facilitating connection with external circuits.

[0043] In the above technical solution, the motor further includes: a casing, which is an injection-molded body, and fixedly connects the insulating frame, the mounting frame, the plurality of pins and the two bearing covers of the motor into a whole, and the outer diameter of the casing is larger than the maximum radial outer contour surface formed by the stator assembly, the insulating frame, the mounting frame, and the plurality of pins. Both axial end faces of the casing include an inner end face and an outer end face connected to the outer edge of the inner end face, and the outer end face is located radially outside the inner end face and at least partially protrudes from the inner end face, so that the axial end faces of the casing form a stepped structure with a higher outer side and a lower inner side, wherein the two inner end faces are flush with the axial end faces of the stator core or do not exceed the axial end faces of the stator core.

[0044] The motor also includes a casing, which is an injection-molded body that covers an insulating frame, a mounting frame, and other structures. This allows the insulating frame, mounting frame, multiple pins, and two bearing caps to be fixedly connected to form a whole, ensuring the stability of the motor. The outer diameter of the casing is larger than the maximum radial outer contour formed by the stator assembly, the insulating frame, the mounting frame, and the multiple pins, ensuring that these components are enclosed within the radial outer surface of the casing, thereby ensuring the integrity and regularity of the motor's appearance and its insulation from the outside. At the same time, the axial end faces of the casing are not regular planes, but rather a stepped structure with a higher outer side and a lower inner side. The radially protruding portion on the outside is recorded as the outer end face and is relatively small in size; the recessed portion on the inside is recorded as the inner end face and is relatively large in size. The two inner end faces are flush with or do not exceed the axial end faces of the stator core (i.e., the two sets of tooth surfaces of the stator core), facilitating more precise and effective control of the axial air gap between the tooth surfaces and the permanent magnets.

[0045] In the above technical solution, a step surface is provided on one axial end of the housing close to the plurality of pins, and the plurality of pins penetrate the step surface and protrude from the step surface along the axial direction of the stator assembly.

[0046] A stepped surface is provided at one axial end of the housing near the plurality of pins, allowing the pins to penetrate the stepped surface and protrude axially from the stator assembly. This provides favorable space for connecting or installing the pins with other conductive components. The stepped surface can be provided on the inner sidewall of the circular boss, further simplifying the housing structure.

[0047] In the above technical solution, the motor further comprises: two end packaging covers, which are coaxially fixedly mounted on the axial ends of the housing, respectively, for packaging the motor and are provided with shaft holes for the corresponding rotating shafts to extend out.

[0048] End caps are installed at both axial ends of the housing to ensure the integrity of the motor and effectively protect its internal structure. The end caps are equipped with axial holes for the corresponding rotating shafts to extend, ensuring that the motor's power can be output. A step is formed between the outer wall of the circular boss and the outer wall of the housing. The end caps can be equipped with a cover edge that fits neatly into this step, giving the motor a more regular outer contour.

[0049] In the above technical solution, the end packaging cover is provided with a bearing chamber for accommodating the corresponding bearing located axially outward of the rotating shaft assembly.

[0050] Bearing chambers are provided on the two end caps to support the axially outer bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the outside of the motor). This provides further support and position limiting for the two rotating support parts, thereby further improving the reliability of the two rotating shaft assemblies. Furthermore, the bearing chambers are integrated into the end caps, allowing the end caps to also function as bearing caps. Compared to solutions that require additional bearing caps fixed to the end caps, this reduces the number of components, simplifies the assembly process, and lowers production costs.

[0051] Optionally, the central portion of the end sealing cover is first recessed to form a depression, and the bottom wall of the depression is then partially raised in the opposite direction to form a projection. The space defined by the projection serves as the bearing chamber. Furthermore, the rotor disk corresponding to the end sealing cover is internally configured with a conical inclined surface to accommodate the end sealing cover. This effectively utilizes the internal space of the hollow channel and further reduces the axial dimension of the motor.

[0052] In the above technical solution, the two outer end surfaces of the housing are respectively provided with circular bosses coaxial with the stator assembly, and the edge of the end packaging cover is provided with an annular groove, and the circular bosses are embedded in the corresponding annular grooves.

[0053] Two circular bosses are provided on the two outer end faces of the casing, and the two circular bosses are coaxially connected to the stator assembly. The edge of the end packaging cover is provided with an annular groove. By embedding the circular boss into the annular groove, the stop joint can be matched, and then the end packaging cover can be assembled in place. The structure is simple and the assembly is convenient.

[0054] In the above technical solution, the motor further includes: an electric control board, which is built between the rotor assembly and the end packaging cover on either side of the motor.

[0055] The setting of the electric control board is conducive to the realization of automatic control of the motor; setting the electric control board on either side of the motor and between the rotor assembly and the end packaging cover on that side not only ensures the stability of the electric control board, but also facilitates the circuit output of the electric control board.

[0056] The technical solution of the second aspect of the present invention provides a fan, comprising: at least one motor as described in any one of the technical solutions of the first aspect; two fans, respectively fixedly connected to the two rotating shaft assemblies of the motor, and the two fans rotate coaxially and independently of each other.

[0057] The fan provided by the technical solution of the second aspect of the present invention includes the motor described in any one of the technical solutions of the first aspect, and thus has significant advantages such as compact structure, strong practical functionality, easy installation, small axial size, and low manufacturing cost.

[0058] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0060] Figure 1 is a schematic diagram of a partial structure of a motor according to some embodiments of the present invention;

[0061] Figure 2 is a schematic diagram of the exploded structure of a motor according to some embodiments of the present invention;

[0062] Figure 3 is a schematic structural diagram of a stator assembly according to some embodiments of the present invention;

[0063] Figure 4 is a schematic diagram of a partial structure of a bearing cover according to some embodiments of the present invention;

[0064] Figure 5 is a partial structural schematic diagram of an end packaging cover according to some embodiments of the present invention;

[0065] Figure 6 is a schematic diagram of a partial structure of a motor according to some embodiments of the present invention;

[0066] Figure 7 is a schematic diagram of a partially exploded structure of a rotor according to some embodiments of the present invention;

[0067] Figure 8 Schematic diagram of the structure of the fan described in some embodiments of the present invention.

[0068] in, Figures 1 to 8The corresponding relationship between the reference numerals and component names is as follows:

[0069] 100-motor; 200-first fan; 300-second fan;

[0070] 1- stator assembly; 11- stator core; 111- stator yoke; 1111- slot; 1112- through hole; 112- stator tooth; 1121- tooth surface; 1122- limiting step; 1123- tooth body; 121- first winding; 122- second winding;

[0071] 21-first rotor assembly; 211-first rotor disk; 212-first permanent magnet; 22-second rotor assembly; 221-second rotor disk; 2211-outside of the disk; 2212-inside of the disk; 222-second permanent magnet;

[0072] 31-first rotating shaft assembly; 311-first rotating shaft; 312-first rotating support portion; 32-second rotating shaft assembly; 321-second rotating shaft, 322-second rotating support portion;

[0073] 41-first bearing cap; 411-outer wall; 412-inner wall; 413-flange; 414-notch; 42-second bearing cap;

[0074] 51-first insulating frame; 52-second insulating frame;

[0075] 6-Mounting frame;

[0076] 7-pin;

[0077] 8- housing; 81- tooth portion wrapping surface; 82- first circular boss; 83- second circular boss; 84- step surface;

[0078] 9-Electrical control board;

[0079] 101 - first end packaging cover; 102 - second end packaging cover; 1021 - bearing chamber; 1022 - annular groove. DETAILED DESCRIPTION

[0080] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0081] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0082] Refer to the following Figures 1 to 8 The motor and the fan according to some embodiments of the present invention are described.

[0083] Example 1

[0084] like Figure 1 and Figure 2 As shown, the motor 100 provided by the embodiment of the first aspect of the present invention includes: a stator assembly 1, two independent rotor assemblies and two independent shaft assemblies.

[0085] Specifically, the stator assembly 1 includes a stator core 11 and two sets of independent windings. A hollow channel is provided in the radial middle of the stator core 11. Figure 2 As shown, the two axial ends of the stator core 11 are provided with stator teeth protruding toward both axial sides thereof, as shown in FIG. Figure 3 As shown, two sets of windings are respectively wound on two sets of stator teeth; two independent rotor assemblies are coaxially arranged on both axial sides of the stator assembly 1 facing away from each other, and form an axial air gap with the stator assembly 1, and the two rotor assemblies are configured to rotate independently of each other; two independent rotating shaft assemblies, the rotating shaft assembly includes a rotating shaft and a rotating support portion, the rotating support portion is at least partially accommodated in the hollow channel and is sleeved on the rotating shaft, used to support the rotating shaft and make the rotating shaft suitable for rotating relative to the stator core 11, the two rotating shafts are respectively coaxially connected to the two rotor assemblies, and protrude in the direction away from the stator core 11 along the axial direction of the motor 100, as shown in FIG. Figure 1 and Figure 2 shown.

[0086] The motor 100 provided in the embodiment of the first aspect of the present invention utilizes a stator assembly 1 in conjunction with two independent rotor assemblies and two independent rotating shaft assemblies to achieve dual-power independent output of a motor 100, which can drive two fans to rotate independently at their respective speeds and directions without interfering with each other. Compared with the solution in which two motors 100 are connected to two fans with their back-facing shafts, at least one stator assembly 1 is eliminated, which reduces the axial size of the fan and reduces the cost of the fan. Compared with the solution in which a single-axis motor 100 is matched with a gear mechanism to achieve shaft extensions at both ends, the two fans can rotate at any speed and in any direction, which has strong practical functionality, significantly improves the diversification of the fan's functionality, eliminates the gear mechanism, and reduces the difficulty of manufacturing and installing the product.

[0087] Specifically, the motor 100 includes a stator assembly 1, two independent rotor assemblies, and two independent shaft assemblies. The stator assembly 1 includes a stator core 11 and two independent windings. Stator teeth are provided at both axial ends of the stator core 11. The two sets of stator teeth protrude axially toward both sides of the stator core 11 for the two windings to be wound around, ensuring that the two windings can act independently on the motor 100. A hollow channel is provided in the radial middle portion of the stator core 11, providing a favorable axial installation space for the shaft assembly, allowing a portion of the two shaft assemblies to be inserted into the hollow channel, thereby further shortening the axial size of the motor 100. The two rotor assemblies are coaxially arranged on both axial sides of the stator assembly 1, facing the two windings respectively, forming an axial air gap with the stator assembly 1, ensuring that the two rotor assemblies do not interfere with each other and can rotate independently of each other. The rotating shaft assembly includes a rotating shaft and a rotating support portion. The rotating support portion is partially or completely accommodated in the hollow channel and is sleeved on the rotating shaft to ensure the stability of the rotating shaft position and stability during rotation. The rotating shaft is coaxially connected to the rotor assembly to realize the power output function of the motor 100. The two rotating shaft assemblies are independent of each other and are coaxially connected to the corresponding rotor assemblies respectively, and rotate synchronously with the corresponding rotor assemblies respectively. Among them, the two rotating shaft assemblies can protrude to the axial sides of the motor 100 respectively, or protrude to the same axial side of the motor 100. Since the two sets of windings of the stator assembly 1 are independent of each other, the two rotor assemblies are independent of each other, and the two rotating shaft assemblies are independent of each other, the axial ends of the motor 100 can output two independent torques, which is equivalent to using one motor 100 to realize the functions of two independent motors 100. Therefore, it has the significant advantages of compact structure, strong practical functionality, easy installation, small axial size, and low manufacturing cost.

[0088] Among them, the two rotor assemblies can be respectively recorded as the first rotor assembly 21 and the second rotor assembly 22, the shaft assembly connected to the first rotor assembly 21 is recorded as the first shaft assembly 31, the shaft assembly connected to the second rotor assembly 22 is recorded as the second shaft assembly 32, the winding cooperating with the first rotor assembly 21 is recorded as the first winding 121, and the winding cooperating with the second rotor assembly 22 is recorded as the second winding 122.

[0089] Specifically, the rotating shaft and the rotation support portion of the first rotating shaft assembly 31 are respectively recorded as the first rotating shaft 311 and the first rotation support portion 312 , and the rotating shaft and the rotation support portion of the second rotating shaft assembly 32 are respectively recorded as the second rotating shaft 321 and the second rotation support portion 322 .

[0090] Optionally, the rotation support comprises at least one bearing, such as Figure 1 and Figure 2 shown.

[0091] The rotational support includes at least one bearing. Using a bearing to support the rotating shaft significantly improves the shaft's reliability. Of course, the rotational support is not limited to bearings and can also be other structures. For example, multiple needle rollers can be circumferentially arranged on the inner sidewall of the hollow channel to support the rotating shaft. Alternatively, multiple connecting rings can be axially arranged on the inner sidewall of the hollow channel, with the inner sidewalls of the connecting rings being smooth, to support the rotating shaft.

[0092] Optionally, there are multiple bearings, which are spaced apart and distributed on both sides of the axial direction of the rotor assembly along the length direction of the rotating shaft, such as Figure 1 and Figure 2 shown.

[0093] Multiple bearings are arranged at intervals along the length direction of the rotating shaft, which can support multiple parts of the rotating shaft, which is beneficial to improving the support reliability of the rotating support part on the rotating shaft, thereby further improving the reliability of the rotating shaft assembly; and multiple bearings are located on both sides of the axial direction of the corresponding rotor assembly, which can disperse the support of multiple parts of the rotating shaft, thereby improving the support reliability of the rotating shaft, significantly reducing the risk of the rotating shaft tilting, etc., thereby improving the reliability of the use of the motor 100.

[0094] Optionally, the number of bearings is two, such as Figure 1 and Figure 2 As shown, the two bearings can not only effectively improve the support reliability of the rotating shaft assembly, but also reduce the number of parts and save production costs.

[0095] Furthermore, if Figure 1 and Figure 2 As shown, the motor 100 further includes: two bearing covers, which are sleeved in the hollow channel and fixedly connected to the stator core 11, and the two bearing covers are arranged back to back to support the corresponding axially inner bearings of the rotating shaft assembly.

[0096] Two bearing covers are arranged in the hollow channel to support the axially inner bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the inside of the motor 100). Since the two bearing covers are arranged back to back, they can play a good limiting role on the two rotating support parts, ensuring that the two rotating shaft assemblies and the stator assembly 1 do not interfere with each other, and reducing the probability of the rotating shaft assembly shaking, tilting, shifting, etc., which is beneficial to improving the reliability of the use of the motor 100, and is also beneficial to improving the assembly accuracy of the rotating shaft assembly, making installation more convenient; and the two bearing covers can act as separators, separating the rotating support parts of the two rotating shaft assemblies, thereby effectively preventing the two rotating shaft assemblies from interfering with each other, further improving the reliability of the two rotating shaft assemblies.

[0097] The bearing cover corresponding to the first rotating shaft assembly 31 is recorded as a first bearing cover 41 , and the bearing cover corresponding to the second rotating shaft assembly 32 is recorded as a second bearing cover 42 .

[0098] Furthermore, the shape of the bearing cap is adapted to the shape of the bearing, such as Figure 2 and Figure 4 As shown, the bearing is accommodated in the bearing cover and supported by the bearing cover, as shown in FIG. Figure 1 shown.

[0099] The bearing cover is adapted to the bearing in form, so that the bearings axially inward of the two rotating shaft assemblies can be sunk into the bearing cover, thereby obtaining effective support and limitation, further improving the reliability of the motor 100.

[0100] Furthermore, the open end of the bearing cover is provided with a flange 413 extending radially outward, such as Figure 4 shown.

[0101] The open end of the bearing cover is provided with a flange 413 which extends radially outwards and can cooperate with the concave and convex parts of the housing 8 which is injected later, playing a certain limiting role and preventing the bearing cover from axially moving relative to the stator core 11.

[0102] Furthermore, at least one notch 414 is provided on the flange 413. Figure 4 shown.

[0103] At least one notch 414 is provided on the flange 413. The notch 414 can mate with the concave-convex structure of the later-injected housing 8, thereby preventing the bearing cap from rotating circumferentially relative to the stator assembly 1, thereby improving the stability of the bearing cap. Optionally, there are multiple notches 414, which are spaced apart along the circumference of the flange 413.

[0104] Optionally, the two rotating shaft assemblies protrude along the axial direction of the motor 100 toward both sides of the axial direction of the motor 100, such as Figure 1 and Figure 2 shown.

[0105] The two rotating shaft assemblies protrude along the axial direction of the motor 100 toward both axial sides of the motor 100, so that both axial ends of the motor 100 can output power, and the power output from both ends of the motor 100 does not interfere with each other, thereby enriching the functionality of the motor 100.

[0106] Of course, the two rotating shafts can also protrude along the axial direction of the motor 100 toward the same axial side of the motor 100, so that one axial end of the motor 100 can output two torques. In this case, the rotating shafts of the two rotating shaft assemblies can be nested.

[0107] Furthermore, the stator core 11 includes a stator yoke 111 and a plurality of stator teeth 112 arranged along the circumferential direction of the stator yoke 111. Figure 3As shown, multiple stator teeth 112 are assembled with the stator yoke 111 to form the stator core 11, and the multiple stator teeth 112 protrude toward the axial sides of the stator yoke 111 to form two groups of stator teeth, and the two groups of windings are respectively wound on the stator teeth on the axial sides of the stator yoke 111.

[0108] This solution splits the stator core 11 into a stator yoke 111 and multiple stator teeth 112, which not only reduces the difficulty of machining the stator core 11 but also reduces the difficulty of winding the two sets of windings. The stator yoke 111 can be formed by laminating multiple stator stampings, and the stator teeth 112 can also be formed by laminating multiple stator stampings. Of course, the stator core 11 can also be a one-piece structure.

[0109] Furthermore, a through hole 1112 adapted to the bearing cover of the motor 100 is provided in the radial middle portion of the stator yoke 111. Figure 3 As shown, the through hole 1112 constitutes a part of the hollow channel of the stator core 11 .

[0110] Since the multiple stator teeth 112 are arranged along the circumferential direction of the stator yoke 111, the multiple stator teeth 112 enclose a certain hollow space, and thus a through hole 1112 is provided in the radial middle part of the stator yoke 111. The through hole 1112 and the aforementioned hollow space form a hollow channel, which can provide a favorable axial installation space for the rotating shaft assembly, thereby shortening the axial dimension of the motor 100.

[0111] Furthermore, a radial outer wall of the stator yoke 111 is provided with a slot 1111, such as Figure 3 As shown, a portion of the stator tooth portion 112 is embedded in the slot 1111 , so that the stator tooth portion 112 is engaged with the stator yoke portion 111 .

[0112] A snap-in groove 1111 is provided on the radial outer side wall of the stator yoke 111 , and the stator teeth 112 can be snap-connected to the stator yoke 111 by means of the snap-in groove 1111 , thereby realizing the assembly of the stator yoke 111 and the stator teeth 112 . The structure is simple, and it is easy to process and assemble.

[0113] Among them, any stator tooth portion 112 includes at least one stator tooth, the stator tooth includes a tooth body 1123 and a tooth surface 1121 connected to one axial end of the tooth body 1123 and located on one axial side of the stator yoke 111, and all tooth surfaces 1121 of any group of stator teeth are located in the same plane and perpendicular to the axis of the stator yoke 111.

[0114] Any stator tooth portion 112 includes at least one stator tooth, which includes a tooth body 1123 and a tooth surface 1121. The tooth surface 1121 is connected to the axial end of the tooth body 1123 away from the stator yoke 111, and is therefore located on one axial side of the stator yoke 111; all tooth surfaces 1121 of any group of stator teeth are located in the same plane and perpendicular to the axis of the stator yoke 111, ensuring that an axial air gap can be formed with the rotor assembly on this side.

[0115] Furthermore, the stator tooth portion 112 includes two stator teeth, and a limiting step 1122 is provided on the tooth body 1123 of the stator tooth portion 112. Figure 3 As shown, the limiting step 1122 abuts against the stator yoke 111 to limit the axial movement of the stator tooth 112 relative to the stator yoke 111 .

[0116] Each stator tooth section 112 includes two stator teeth, with the tooth surfaces 1121 of the two stator teeth located on opposite axial sides of the stator yoke 111, forming an axial air gap with the rotor assemblies on either side. Compared to a solution in which a stator tooth section 112 includes only one stator tooth, this reduces the number of stator teeth 112 and simplifies the assembly process. Of course, a stator tooth section 112 can also include only one stator tooth, with two stator tooth sections 112 installed in opposite directions at one location on the stator core 11 to form two stator teeth.

[0117] Example 2

[0118] The difference from the first embodiment is that: based on the first embodiment, further, as Figure 7 As shown, the rotor assembly includes a rotor disk coaxially connected to the corresponding rotating shaft and a permanent magnet mounted on the rotor disk. The rotor disk includes, from the outside to the inside, a disk outer portion 2211 and a disk inner portion 2212 connected to the disk outer portion 2211 in its radial direction. The disk outer portion 2211 is a disk-shaped structure, and the disk inner portion 2212 is a disk-shaped structure or a conical structure.

[0119] The rotor assembly includes a rotor disk and permanent magnets. The rotor disk serves as a mounting carrier for the permanent magnets and provides a coaxial connection between the rotor assembly and the rotating shaft. The permanent magnets are mounted on the rotor disk, generating a magnetic field that interacts with the stator assembly 1. The rotor disk's exterior 2211 is a disc-shaped structure, offering a relatively regular structure that facilitates machining and molding, as well as the arrangement of multiple permanent magnets. The interior 2212 of the disk is a disc-shaped or conical structure, facilitating the rational design of the rotor disk and rotating shaft assembly based on the specific product structure and providing space for the installation of other components.

[0120] Specifically, the rotor disk and the permanent magnet of the first rotor assembly 21 are respectively denoted as a first rotor disk 211 and a first permanent magnet 212 , and the rotor disk and the permanent magnet of the second rotor assembly 22 are respectively denoted as a second rotor disk 221 and a second permanent magnet 222 .

[0121] Optionally, the rotor disk and the rotating shaft are an integral structure formed by injection molding.

[0122] Optionally, the rotor disk and the rotating shaft are an integrated structure formed by welding.

[0123] Optionally, the rotor disk is threadedly connected to the rotating shaft.

[0124] Optionally, the rotor disk is interference fit with the rotating shaft.

[0125] The shaft assembly includes a shaft that is coaxially connected to the rotor disk and fixed together by injection molding or welding to form an integrated structure, or is fixedly connected by threaded connection, interference fit, etc., effectively ensuring the reliability of the connection between the shaft and the rotor disk, thereby ensuring the reliability of the synchronous rotation of the shaft and the rotor assembly. Of course, the shaft and the rotor disk can also be fixedly connected by other methods, such as fastener connection, welding, etc.

[0126] Optionally, the permanent magnet is a circular or fan-shaped pie-shaped structure, and the number of permanent magnets is multiple, and the multiple permanent magnets are evenly distributed circumferentially on the axial surface of the stator yoke 111 of the rotor disk facing the stator core 11, forming an axial magnetic flux; the N poles and S poles of two adjacent permanent magnets are arranged alternately or in a Halbach array.

[0127] The permanent magnets are circular or fan-shaped, pancake-like structures, which facilitate arrangement and reduce the axial size of the motor 100. Multiple permanent magnets are evenly distributed along the circumferential direction of the rotor disk on the surface facing the stator yoke 111, forming an axial magnetic flux between the rotor assembly and the stator assembly 1. The north and south poles of two adjacent permanent magnets can be arranged alternately or in a Halbach array, which can be adjusted according to product requirements.

[0128] Example 3

[0129] The difference from the second embodiment is that: based on the second embodiment, the motor 100 further includes: an insulating frame, a mounting frame 6 and a plurality of pins 7, such as Figure 1 and Figure 2 shown.

[0130] Specifically, the insulating frame is mounted on the stator teeth; the mounting frame 6 is fixedly connected to the insulating frame; a plurality of pins 7 are inserted into the mounting frame 6 , and the lead wires of the two sets of windings are fixedly connected to the plurality of pins 7 .

[0131] The motor 100 also includes an insulating frame, a mounting frame 6 and a plurality of pins 7. The insulating frame is mounted on the stator teeth to ensure the safety and reliability of the windings mounted on the stator teeth. The mounting frame 6 is fixedly connected to the insulating frame and is provided with a plurality of pins 7. The lead wires of the two sets of windings are fixedly connected to the plurality of pins 7, thereby leading the leads of the two sets of windings to a fixed and stable conductive carrier.

[0132] There are two or two groups of insulating frames, which are respectively mounted on two groups of stator teeth and are respectively denoted as a first insulating frame 51 and a second insulating frame 52 . The mounting frame 6 is fixedly connected to one of the insulating frames.

[0133] Specifically, the mounting frame 6 is an arc-shaped strip structure coaxial with the stator assembly 1, and the mounting frame 6 and the plurality of pins 7 are located radially outside the rotor assembly, such as Figure 6 shown.

[0134] The mounting frame 6 is an arc-shaped strip structure coaxial with the stator assembly 1, and the mounting frame 6 and multiple pins 7 are located radially outside the two rotor assemblies, so that the structure of the motor 100 is relatively regular and not easy to interfere with the internal magnetic field of the motor 100, while being convenient for connection with external circuits.

[0135] Furthermore, the motor 100 further includes a housing 8, such as Figure 2 As shown, the housing 8 is an injection molded body, and the insulating frame, the mounting frame 6, the plurality of pins 7 and the two bearing covers of the motor 100 are fixedly connected into a whole, as shown in FIG. Figure 6 As shown, the outer diameter of the casing 8 is larger than the maximum radial outer contour surface formed by the stator assembly 1, the insulating frame, the mounting frame 6, and the plurality of pins 7. Both axial end surfaces of the casing 8 include an inner end surface and an outer end surface connected to the outer edge of the inner end surface. The outer end surface is located radially outside the inner end surface and at least partially protrudes from the inner end surface, so that the axial end surfaces of the casing 8 form a stepped structure with a high outside and a low inside, wherein the two inner end surfaces are flush with the axial end surfaces of the stator core 11 or do not exceed the axial end surfaces of the stator core 11.

[0136] The motor 100 also includes a housing 8, which is an injection molded body and covers an insulating frame, a mounting frame 6 and other structures, so that the insulating frame, the mounting frame 6, a plurality of pins 7 and two bearing covers can be fixedly connected to form a whole, thereby ensuring the stability of the motor 100; and the outer diameter of the housing 8 is larger than the maximum radial outer contour surface formed by the stator assembly 1, the insulating frame, the mounting frame 6 and the plurality of pins 7, thereby ensuring that these components are covered within the radial outer surface of the housing 8, thereby ensuring the integrity and regularity of the appearance of the motor 100 and its insulation from the outside. At the same time, the axial end faces of the housing 8 (also called the tooth wrapping surface 81) are not regular planes, but a stepped structure with a high outside and a low inside, such as Figure 2 and Figure 5 As shown in the figure, the radially outward protruding portion is recorded as the outer end surface, which is relatively small in size; the inner concave portion is recorded as the inner end surface, which is relatively large in size. Figure 2 and Figure 5 shown.

[0137] Among them, the two inner end surfaces (that is, the two axial end surfaces on the radial inner side of the casing 8) are flush with or do not exceed the two axial end surfaces of the stator core 11 (that is, the two sets of tooth surfaces 1121 of the stator core 11), which facilitates more precise and effective control of the axial air gap between the tooth surfaces and the permanent magnets.

[0138] Furthermore, the housing 8 is provided with a step surface 84 at one axial end close to the plurality of pins 7. The plurality of pins 7 penetrate the step surface 84 and protrude from the step surface 84 along the axial direction of the stator assembly 1. Figure 6 shown.

[0139] A step surface 84 is provided at one axial end of the housing 8 near the plurality of pins 7, so that the plurality of pins 7 pass through the step surface 84 and protrude from the step surface 84 along the axial direction of the stator assembly 1, thereby providing favorable space for connection or installation of the pins 7 with other conductive parts.

[0140] Further, if Figure 1 and Figure 2 As shown, the motor 100 further includes: two end packaging covers, which are coaxially fixedly mounted on the axial ends of the housing 8, respectively, for packaging the motor 100, and are provided with shaft holes for the corresponding rotating shafts to extend out.

[0141] End caps are installed at both axial ends of the housing 8 to ensure the integrity of the motor 100 and effectively protect its internal structure. The end caps are provided with axial holes for the corresponding rotating shafts to extend, ensuring that the power of the motor 100 can be output. A step is formed between the outer wall of the circular boss and the outer wall of the housing 8. The end caps can be provided with a cover edge that fits neatly into this step, giving the outer contour of the motor 100 a more regular appearance.

[0142] The end packaging cover located on one side of the first rotor assembly 21 is recorded as a first end packaging cover 101 , and the end packaging cover located on one side of the second rotor assembly 22 is recorded as a second end packaging cover 102 .

[0143] Furthermore, the end packaging cover is provided with a bearing chamber 1021 for accommodating the corresponding bearing of the rotating shaft assembly axially outward, such as Figure 5 shown.

[0144] Bearing chambers 1021 are provided on the two end caps to support the axially outward bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the exterior of the motor 100). This further supports and limits the two rotating support components, thereby further improving the reliability of the two rotating shaft assemblies. Furthermore, the integration of bearing chambers 1021 into the end caps allows the end caps to also function as bearing caps. Compared to solutions that require additional bearing caps fixed to the end caps, this reduces the number of components, simplifies the assembly process, and lowers production costs.

[0145] Alternatively, as Figure 5 As shown, the middle part of the end packaging cover is first concave to form a sink, and the bottom wall of the sink is partially reversely convex to form a boss. The space defined by the boss is the bearing chamber 1021. Furthermore, the inner part of the rotor disk corresponding to the end packaging cover is constructed into a conical inclined surface structure, such as Figure 7 As shown, the end packaging cover is adapted to fit in. This can reasonably utilize the internal space of the hollow channel, which is beneficial to further reduce the axial size of the motor 100.

[0146] Furthermore, the two outer end surfaces of the housing 8 are respectively provided with circular bosses coaxial with the stator assembly 1, such as Figure 6 As shown, an annular groove 1022 is provided at the edge of the end packaging cover, and the circular boss is embedded in the corresponding annular groove 1022. Figure 1 shown.

[0147] Two circular bosses are provided on the two outer end faces of the casing (that is, the two axial end faces on the radial outer side of the casing 8), and the two circular bosses are coaxially connected to the stator assembly. The edge of the end packaging cover is provided with an annular groove 1022. The circular boss is embedded in the annular groove 1022 to achieve stop fitting, thereby realizing the assembly of the end packaging cover in place. The structure is simple and the assembly is convenient.

[0148] The circular boss located on one side of the first rotor assembly 21 is referred to as the first circular boss 82, and the circular boss located on one side of the second rotor assembly 22 is referred to as the second circular boss 83. Furthermore, the step surface 84 may be provided on the inner side wall of one of the circular bosses, such as Figure 6 As shown, the structure of the housing 8 is further simplified.

[0149] Further, if Figure 1 and Figure 2 As shown, the motor 100 further includes: an electric control board 9, which is built between the rotor assembly and the end packaging cover on either side of the motor 100.

[0150] The setting of the electric control board 9 is conducive to realizing the automatic control of the motor 100; the electric control board 9 is set on any side of the motor 100 and is located between the rotor assembly and the end packaging cover on that side, which not only ensures the stability of the electric control board 9 but also facilitates the circuit output of the electric control board 9.

[0151] like Figure 8 As shown, the fan provided by the embodiment of the second aspect of the present invention includes: at least one motor 100 as any one of the embodiments of the first aspect and two fans, the two fans are respectively fixedly connected to the two rotating shaft assemblies of the motor 100, and the two fans rotate coaxially and independently of each other.

[0152] The fan provided by the embodiment of the second aspect of the present invention includes the motor 100 of any one of the embodiments of the first aspect, and thus has significant advantages such as compact structure, strong practical functionality, easy installation, small axial size, and low manufacturing cost.

[0153] The fan connected to the first rotating shaft assembly 31 is recorded as the first fan 200 , and the fan connected to the second rotating shaft assembly 32 is recorded as the second fan 300 .

[0154] In this manual, Figure 1 The extending direction of the central axis is simply referred to as the “axial direction”, the direction surrounding the central axis is simply referred to as the “circumferential direction”, and the direction perpendicular to the central axis is simply referred to as the “radial direction”.

[0155] The motor 100 and the fan provided in the present application are described below with reference to a specific example.

[0156] like Figures 1 to 8 As shown, a motor 100 includes: a stator assembly 1, two rotor assemblies (ie, a first rotor assembly 21 and a second rotor assembly 22) and two rotating shaft assemblies (ie, a first rotating shaft assembly 31 and a second rotating shaft assembly 32).

[0157] Specifically, the stator assembly 1 includes a stator core 11 and two sets of windings (i.e., a first winding 121 and a second winding 122). The stator core 11 is connected by a stator yoke 111 and a plurality of detachable stator teeth 112 to form a radially hollow whole with teeth extending on both sides axially. The radial hollowness of the stator provides a favorable axial installation space for the bearings of the motor 100. The first winding 121 and the second winding 122 are respectively wound on the stator tooth body 1123 on both sides of the axial direction of the stator, and the first winding 121 and the second winding 122 can act on the motor 100 independently of each other.

[0158] The stator yoke 111 has multiple slots (i.e., slots 1111) on the radial outer side for the mating installation of the stator teeth 112; the stator yoke 111 has circular hole slots (i.e., through holes 1112) on the radial inner side for partially or completely accommodating the first rotating support portion 312 of the first rotating shaft assembly 31 and the second rotating support portion 322 of the second rotating shaft assembly 32.

[0159] A single stator tooth portion 112 has at least one tooth body 1123 and at least one tooth surface 1121. After multiple stator tooth portions 112 are installed in conjunction with the stator yoke portion 111, the stator yoke portion 111 has two groups of tooth bodies 1123 and two groups of tooth surfaces 1121 on both axial sides, and a group of tooth surfaces 1121 acting on the same rotor assembly are all in the same plane and perpendicular to the axis; a limiting step 1122 is designed on the surface where the stator tooth portion 112 and the stator yoke portion 111 are installed in conjunction with each other, which is used to abut against the axial end face of the stator yoke portion 111 to limit the axial relative position of the stator tooth portion 112 and the stator yoke portion 111.

[0160] The first rotor assembly 21 and the second rotor assembly 22 are coaxially rotatably disposed on opposite sides of the stator assembly 1, forming an axial air gap with the stator assembly 1. The first rotor assembly 21 includes a first rotor disk 211 and a first permanent magnet 212, and the second rotor assembly 22 includes a second rotor disk 221 and a second permanent magnet 222. The first rotor assembly 21 and the second rotor assembly 22 can rotate independently of each other.

[0161] The first rotor disk 211 and the second rotor disk 221 have substantially the same structure. Taking one of the rotor disks as an example for explanation, the radial outer side of the rotor disk is a disc-shaped structure, and the radial inner side is a disc-shaped flat surface or a conical inclined surface structure, providing favorable space for the installation of other parts.

[0162] The radial outer side of the rotor disk is a disc-shaped structure and is fixedly connected to the corresponding rotating shaft through a threaded connection.

[0163] The first permanent magnet 212 and the second permanent magnet 222 are circular or fan-shaped pancake structures and are evenly distributed circumferentially on the axial surface of the rotor disc structure to form an axial magnetic flux; the N and S poles of two adjacent permanent magnets are alternately arranged or in a Halbach arrangement.

[0164] The first and second rotating shaft assemblies 31 and 32 are coaxially fixedly connected to the first and second rotor assemblies 21 and 22, respectively, and are output coaxially from opposite axial sides of the motor 100. The first and second rotating shaft assemblies 31 and 32 can rotate independently of each other. The first rotating shaft assembly 31 includes a first rotating shaft 311 and two bearings. The two bearings are coaxially arranged radially outward from the first rotating shaft 311 and are located on opposite axial sides of the rotor assembly to which they are fixed, forming a first rotating support portion 312. The second rotating shaft assembly 32 includes a second rotating shaft 321 and two bearings. The two bearings are coaxially arranged radially outward from the second rotating shaft 321 and are located on opposite axial sides of the rotor assembly to which they are fixed, forming a second rotating support portion 322. The first rotating support portion 312 of the first rotating shaft assembly 31 and the second rotating support portion 322 of the second rotating shaft assembly 32 are located on opposite axial sides of the motor 100 and are partially or completely housed within the radial hollow space of the stator assembly 1.

[0165] Motor 100 also includes two bearing caps (i.e., a first bearing cap 41 and a second bearing cap 42). The first bearing cap 41 and the second bearing cap 42 are coaxially fixedly connected to the stator assembly 1 and are disposed in the circular slots of the stator yoke 111 with their backs facing outward, thereby supporting the bearings of the first and second rotating shaft assemblies 31 and 32 located near the interior of the motor 100. The first and second bearing caps 41 and 42 are thin-walled cylindrical structures. The first bearing cap 41 will be used as an example for detailed description. The outer wall 411 of the first bearing cap 41 mates with the radially inner circular slot of the stator yoke 111, while the inner wall 412 of the first bearing cap 41 mates with the bearings of the first rotating shaft assembly 31. A small flange 413 is designed on the radially outer side of the first bearing cap 41, and a plurality of small notches 414 are evenly distributed radially on the flange 413 to prevent rotation.

[0166] Motor 100 further includes a first insulating frame 51 and a second insulating frame 52 mounted on the tooth body 1123 of the stator teeth, a mounting bracket 6 fixedly connected to the first insulating frame 51 or the second insulating frame 52, and a plurality of pins 7 inserted into mounting bracket 6. Lead wires from the first winding 121 and the second winding 122 are fixedly connected to the plurality of pins 7, thereby leading the lead wires from the first winding 121 and the second winding 122 to a fixed and stable conductive carrier.

[0167] The mounting frame 6 is an arc-shaped strip structure coaxial with the stator. The mounting frame 6 and the plurality of pins 7 are located radially outside the first rotor assembly 21 and the second rotor assembly 22 .

[0168] Motor 100 also includes a plastic housing 8, which securely connects stator assembly 1, first and second insulating frames 51, 52, mounting bracket 6, multiple pins 7, first and second bearing caps 41, 42 into a single unit. The outer diameter of plastic housing 8 is larger than the maximum radial outer contour formed by stator assembly 1, first and second insulating frames 51, 52, mounting bracket 6, and multiple pins 7. The axial wrapping surfaces of stator teeth 112 on either side (i.e., the axial end faces of housing 8) are flush with or do not extend beyond the two sets of tooth surfaces 1121 of stator assembly 1. Two cylindrical bosses (i.e., circular bosses) are coaxial with stator assembly 1 on the outer axial ends of plastic housing 8. Plastic housing 8 has a stepped surface 84 on the side where pins 7 are located, with pins 7 protruding a certain distance from stepped surface 84 to provide space for connection or installation of pins 7 with other conductive components.

[0169] Motor 100 also includes a first end encapsulating cap 101 and a second end encapsulating cap 102. These caps 101 and 102 pass through first and second rotating shafts 311 and 321, respectively, and are coaxially fixedly mounted on the axial ends of plastic housing 8. These caps 101 and 102 are used to support the bearings of first and second rotating shaft assemblies 31 and 32 near the outside of motor 100 and to encapsulate the motor. Taking second end encapsulating cap 102 as an example for detailed description, the outer side of second end encapsulating cap 102 is designed with a stop (i.e., an annular groove 1022) that mates with the cylindrical boss (i.e., second circular boss 83) of the plastic housing. A bearing chamber 1021 is designed radially inwardly, recessed toward the inside of the main body. This allows the bearing to be sunken into the inner side of second end encapsulating cap 102, thereby reducing the overall axial dimensions of motor 100.

[0170] The motor 100 may further include an electric control board 9 , which is built between the first rotor assembly 21 and the first end packaging cover 101 or between the second rotor assembly 22 and the second end packaging cover 102 on either side of the motor 100 .

[0171] A fan includes: a motor 100, a first fan 200, and a second fan 300. The first fan 200 and the second fan 300 are respectively coaxially fixedly connected to a first rotating shaft assembly 31 and a second rotating shaft assembly 32 output on both sides of the motor 100. The first fan 200 and the second fan 300 rotate coaxially and independently of each other.

[0172] Therefore, the above-mentioned motor and fan have significant advantages such as compact structure, strong practical functionality, easy installation, small axial size, and low manufacturing cost.

[0173] In summary, the motor provided by the present invention utilizes a stator assembly in conjunction with two independent rotor assemblies and two independent rotating shaft assemblies to achieve dual-power independent output from a single motor, and can drive two fans to rotate independently at their respective speeds and directions without interfering with each other. Compared to the solution in which two motors are connected to two fans with their back-facing shafts, at least one stator assembly is eliminated, which reduces the axial size of the fan and reduces the cost of the fan. Compared to the solution in which a single-axis motor and a gear mechanism are combined to achieve shaft extensions at both ends, the two fans can rotate at any speed and in any direction, which is highly practical and functional, significantly improving the diversification of the fan's functionality, eliminating the gear mechanism, and reducing the difficulty of manufacturing and installing the product.

[0174] In the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0175] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0176] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0177] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: The stator assembly includes a stator core and two independent winding groups, wherein a hollow channel is provided in the radial middle portion of the stator core, and stator teeth are provided at both axial ends of the stator core, protruding axially toward both sides thereof, and the two winding groups are respectively wound around the two groups of stator teeth; Two independent rotor assemblies are coaxially arranged on opposite axial sides of the stator assembly and form an axial air gap with the stator assembly, and the two rotor assemblies are configured to rotate independently of each other; and Two independent rotating shaft assemblies, each comprising a rotating shaft and a rotating support portion, wherein the rotating support portion is at least partially accommodated in the hollow channel and sleeved on the rotating shaft, and is used to support the rotating shaft and enable the rotating shaft to rotate relative to the stator core. The two rotating shafts are respectively coaxially connected to the two rotor assemblies and protrude in the axial direction of the motor in a direction away from the stator core. The stator core includes a stator yoke and a plurality of stator teeth arranged in a circumferential direction of the stator yoke, wherein the plurality of stator teeth protrude toward both axial sides of the stator yoke to form two groups of stator teeth. The stator core is connected by the stator yoke and the plurality of detachable stator teeth to form an integral body with tooth bodies on both axial sides, and the two groups of windings are respectively wound around the stator teeth on both axial sides of the stator yoke. The rotation support portion includes at least one bearing; Two bearing covers are sleeved in the hollow channel and fixedly connected to the stator core, and the two bearing covers are arranged back to back and are used to respectively support the corresponding bearings located axially inward of the rotating shaft assembly.

2. The motor according to claim 1, characterized in that There are multiple bearings, and the multiple bearings are spaced apart and distributed on both sides of the axial direction of the corresponding rotor assembly along the length direction of the rotating shaft.

3. The motor according to claim 2, characterized in that The bearing cover is adapted to the shape of the bearing, and the bearing is accommodated in the bearing cover and supported by the bearing cover.

4. The motor according to claim 3, characterized in that The open end of the bearing cover is provided with a flange extending radially outward.

5. The motor according to claim 4, characterized in that At least one notch is provided on the flange.

6. The motor according to any one of claims 1 to 5, characterized in that The two rotating shafts protrude toward both sides of the axial direction of the motor respectively along the axial direction of the motor.

7. The motor according to any one of claims 1 to 5, characterized in that A through hole adapted to the bearing cover of the motor is provided in the radial middle portion of the stator yoke, and the through hole constitutes a part of the hollow channel of the stator core; and / or A radial outer side wall of the stator yoke is provided with a clamping groove, and a part of the stator tooth portion is embedded in the clamping groove, so that the stator tooth portion is clamped and matched with the stator yoke portion.

8. The motor according to claim 7, characterized in that Any of the stator tooth portions includes at least one stator tooth, and the stator tooth includes a tooth body and a tooth surface connected to one axial end of the tooth body and located on one axial side of the stator yoke portion. All tooth surfaces of any group of stator teeth are located in the same plane and perpendicular to the axis of the stator yoke portion.

9. The motor according to claim 8, characterized in that The stator tooth portion includes two stator teeth, and a limiting step is provided on the tooth body of the stator tooth portion, and the limiting step abuts against the stator yoke portion to limit the axial movement of the stator tooth portion relative to the stator yoke portion.

10. The electric motor according to any one of claims 1 to 5, characterized in that The rotor assembly includes a rotor disk coaxially connected to the corresponding rotating shaft and a permanent magnet mounted on the rotor disk. The rotor disk includes, from the outside to the inside along its radial direction, an outer disk body and an inner disk body connected to the outer disk body. The outer disk body is a disc-shaped structure, and the inner disk body is a disc-shaped structure or a conical structure.

11. The motor according to claim 10, characterized in that The rotor disk and the corresponding rotating shaft are an integral structure formed by injection molding or welding; or The rotor disk is threadedly connected to the rotating shaft or is interference-fitted therewith.

12. The motor according to claim 10, characterized in that The permanent magnet is a circular or fan-shaped pie-shaped structure, and there are multiple permanent magnets. The multiple permanent magnets are evenly distributed circumferentially on the axial surface of the stator yoke of the rotor disk facing the stator core to form an axial magnetic flux; the N poles and S poles of two adjacent permanent magnets are arranged alternately or in a Halbach array.

13. The electric motor according to any one of claims 1 to 5, characterized in that Also includes: an insulating frame mounted on the stator teeth; a mounting frame fixedly connected to the insulating frame; A plurality of pins are inserted on the mounting frame, and the lead wires of the two groups of windings are fixedly connected to the plurality of pins.

14. The motor according to claim 13, characterized in that The mounting frame is an arc-shaped strip structure coaxial with the stator assembly, and the mounting frame and the plurality of pins are located radially outside the rotor assembly.

15. The motor according to claim 13, characterized in that Also includes: The casing is an injection-molded body, and the insulating frame, the mounting frame, the plurality of pins and the two bearing covers of the motor are fixedly connected into a whole, and the outer diameter of the casing is larger than the maximum radial outer contour surface formed by the stator assembly, the insulating frame, the mounting frame, and the plurality of pins. Both axial end faces of the casing include an inner end face and an outer end face connected to the outer edge of the inner end face, and the outer end face is located radially outside the inner end face and at least partially protrudes from the inner end face, so that the axial end faces of the casing form a stepped structure with a higher outer side and a lower inner side, wherein the two inner end faces are flush with or do not exceed the axial end faces of the stator core.

16. The motor according to claim 15, characterized in that A step surface is provided at one axial end of the housing close to the plurality of pins, and the plurality of pins penetrate the step surface and protrude from the step surface along the axial direction of the stator assembly.

17. The motor according to claim 15, characterized in that Also includes: Two end packaging covers are coaxially fixedly installed on the axial ends of the housing, used for packaging the motor, and are provided with shaft holes for the corresponding rotating shafts to extend out.

18. The motor according to claim 17, characterized in that The end packaging cover is provided with a bearing chamber for accommodating the corresponding bearing located axially outward of the rotating shaft assembly.

19. The motor according to claim 17, characterized in that The two outer end surfaces of the housing are respectively provided with circular bosses coaxial with the stator assembly, and the edge of the end packaging cover is provided with an annular groove, and the circular bosses are embedded in the corresponding annular grooves.

20. The motor according to claim 17, wherein Also includes: The electric control board is built between the rotor assembly and the end packaging cover on either side of the motor.

21. A fan, characterized in that: include: at least one electric machine according to any one of claims 1 to 20; The two fans are fixedly connected to the two rotating shaft assemblies of the motor respectively, and the two fans rotate coaxially and independently of each other.

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