Electric machine and fan

Abstract

The application provides a motor and a fan, and the motor comprises a stator assembly, two groups of independent windings and two independent rotor assemblies; the stator assembly comprises a stator core and two groups of independent windings; the middle part of the stator core in the radial direction is provided with a hollow channel; the two ends of the stator core in the axial direction are provided with stator teeth protruding to the two sides in the axial direction; the two groups of windings are wound on the two groups of stator teeth respectively; the two independent rotor assemblies are coaxially arranged on the two sides of the stator assembly in the axial direction and form axial air gaps with the stator assembly; the two rotor assemblies are configured to rotate independently; the two independent rotor shaft assemblies are coaxially connected with the two rotor assemblies respectively and protrude away from the stator core in the same side direction in the axial direction of the motor; and a part of the two rotor shaft assemblies is arranged in the hollow channel. The application realizes the independent output of double power of a motor, has the advantages of compact structure, strong practical function, convenient 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 toward both sides thereof at both axial 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 both axial sides of the stator assembly facing away from each other, forming an axial air gap with the stator assembly, and the two rotor assemblies being configured to rotate independently of each other; and two independent rotating shaft assemblies, coaxially connected to the two rotor assemblies, respectively, and protruding along the axial direction of the motor toward the same side away from the stator core, and a portion of the two rotating shaft assemblies being placed in the hollow channel.

[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 mutually independent rotor assemblies and two mutually independent rotating shaft assemblies. The stator assembly comprises a stator core and two groups of mutually independent windings; the axial both ends of the stator core are provided with stator teeth, the two groups of stator teeth protrude along the axial direction of the stator core to the two sides, for winding the two groups of windings, to ensure that the two groups of windings can act on the motor independently; the radial middle part of the stator core is provided with a hollow channel, which provides a favorable axial installation space for the installation of the rotating shaft assembly, so that a part of the two rotating shaft assemblies can be inserted into the hollow channel, thereby further shortening the axial size of the motor. The two rotor assemblies are coaxially arranged on the axial both sides of the stator assembly, respectively facing the two groups of windings, and form axial air gaps with the stator assembly, to ensure that the two rotor assemblies do not interfere with each other and realize independent rotation. The two rotating shaft assemblies are independent of each other and are coaxially connected with the corresponding rotor assemblies, respectively, and rotate synchronously with the corresponding rotor assemblies. Among them, the two rotating shaft assemblies protrude to the same side of the axial direction of the motor, so that the axial one end of the motor can output two kinds of independent power, compared with protruding to the axial both sides of the motor, it is beneficial to shorten the axial distance of the output end of the motor. Since the two groups of 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, the axial both ends of the motor can output two independent torques, which is equivalent to using one motor to realize the function of two independent motors, so it has the remarkable advantages of compact structure, strong practical function, easy installation, small axial size and low manufacturing cost.

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

[0009] In the above technical solution, the rotating shaft assembly comprises a rotating shaft, the rotating shaft of one of the rotating shaft assemblies is a hollow shaft, and the rotating shaft of the other rotating shaft assembly extends through the hollow shaft and is adapted to rotate relative to the hollow shaft.

[0010] The rotating shaft assembly comprises a rotating shaft, and the rotating shaft of one of the rotating shaft assemblies is a hollow shaft. The rotating shaft of the other rotating shaft assembly can extend through the hollow shaft, thereby realizing the protrusion of the two rotating shaft assemblies in the same direction, so that the axial one end of the motor can be connected with two fans or other components at the same time. Alternatively, the rotating shaft of the other rotating shaft assembly is a solid shaft, which is beneficial to improve the strength of the shaft. Of course, the rotating shaft of the other rotating shaft assembly can also be a hollow shaft.

[0011] In the above technical solution, the rotating shaft of the other rotating shaft assembly comprises a connecting section and an extension section connected with the connecting section, the outer diameter of the connecting section is equal to the outer diameter of the hollow shaft, and the connecting section and the hollow shaft are arranged along the axial direction of the hollow channel, and the extension section extends through the hollow shaft.

[0012] The shaft of the other shaft assembly comprises a connecting section and an extending section, the outer diameter of the connecting section is equal to the outer diameter of the hollow shaft, and the connecting section and the hollow shaft are arranged along the axis direction of the hollow channel, so that the outer contour of the part of the two shafts assembled in the hollow channel is flush, the structure of the product is more regular, the product is convenient for processing and forming, and the two shafts are convenient for assembling; meanwhile, the part (i.e. the connecting section) of the shaft connecting the rotor assembly is relatively thick, the strength of the shaft is improved, the use reliability of the shaft is improved, and the same type of bearing and other support structures are used to support the two shafts, so that the reliability and stability of the motor are improved.

[0013] In the above technical solution, the motor further comprises a shaft sleeve arranged in the hollow channel, and a part of the two shaft assemblies is inserted into the shaft sleeve.

[0014] The shaft sleeve is arranged in the hollow channel, and one end of the two shaft assemblies is inserted into the shaft sleeve, the shaft sleeve can well limit the two shaft assemblies, the mutual interference between the two shaft assemblies and the stator assembly is avoided, the probability of the shaking, tilting and displacement of the shaft assembly is reduced, the coaxiality of the two shaft assemblies is improved, the use reliability of the motor is improved, the assembly precision of the shaft assembly is improved, and the motor is convenient to install.

[0015] In any of the above technical solutions, the motor further comprises a support bearing coaxially arranged between the output end of the hollow shaft and the other shaft.

[0016] The support bearing is arranged between the output end of the hollow shaft and the other shaft, the support stiffness of the two shaft assemblies is further improved, and the use reliability of the motor is further improved.

[0017] In any of the above technical solutions, the two shaft assemblies respectively protrude along the axial direction of the motor to the same side of the axial direction of the motor.

[0018] The two shaft assemblies respectively protrude along the axial direction of the motor to the same side of the axial direction of the motor, so that the two powers can be output from the one end of the motor, and the two powers do not interfere with each other, and the functionality of the motor is enriched.

[0019] Of course, the two shaft assemblies can also protrude along the axial direction of the motor to both sides of the axial direction of the motor, so that the two torques can be output from the two ends of the motor.

[0020] 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.

[0021] 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.

[0022] In the above technical solution, a through hole adapted to the shaft sleeve 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In any of the above technical solutions, the rotor assembly includes a rotor disk coaxially connected to the shaft assembly 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.

[0030] 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 shaft assembly. 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 shaft assembly assembly based on the specific product structure, providing space for the installation of other components.

[0031] In the above technical solution, the shaft assembly includes a shaft, and the rotor disk is coaxially connected to the shaft; wherein, the rotor disk and the shaft are an integral structure formed by injection molding or welding, or the rotor disk and the shaft are threadedly connected or interference fit.

[0032] 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.

[0033] 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.

[0034] The permanent magnets are in a circular or sector-shaped pie structure, facilitating arrangement and reducing the axial dimension of the motor, and a plurality of permanent magnets are uniformly distributed on the surface of the rotor disc facing the stator yoke in the circumferential direction of the rotor disc, so that axial magnetic flux is formed between the rotor assembly and the stator assembly. The N poles and S poles of adjacent two permanent magnets can be alternately arranged or arranged in a Halbach array, and the arrangement can be adjusted according to product requirements.

[0035] In any of the above technical solutions, the rotating shaft assembly comprises a rotating shaft and a rotating support part, the rotating support part is accommodated in the shaft sleeve and located between the shaft sleeve and the rotating shaft, used for supporting the rotating shaft and making the rotating shaft suitable for rotating relative to the shaft sleeve, and the rotating shaft is coaxially connected with the rotor assembly.

[0036] The rotating shaft assembly comprises a rotating shaft and a rotating support part, the rotating support part is accommodated in the shaft sleeve and located between the shaft sleeve and the rotating shaft, ensuring the stability of the position of the rotating shaft and the stability in the rotating process; the rotating shaft is coaxially connected with the rotor assembly, realizing the power output function of the motor.

[0037] In the above technical solution, the rotating support part comprises at least one bearing.

[0038] The rotating support part comprises at least one bearing, and the bearing is used for supporting the rotating shaft, so that the use reliability of the rotating shaft can be significantly improved. Of course, the rotating support part is not limited to the bearing, and can also be other structures. For example, a plurality of needle rollers are arranged on the inner side wall of the shaft sleeve in the circumferential direction, and the plurality of needle rollers are used for supporting the rotating shaft; or a plurality of connecting rings are arranged on the inner side wall of the shaft sleeve in the axial direction, the inner side wall of the connecting ring is a smooth surface, and the plurality of connecting rings are used for supporting the rotating shaft.

[0039] In the above technical solution, the number of bearings is multiple, and the multiple bearings are distributed on the same side of the rotor assembly in the length direction of the rotating shaft.

[0040] The multiple bearings are arranged in the length direction of the rotating shaft, the multiple parts of the rotating shaft can be supported, the support reliability of the rotating support part to the rotating shaft can be improved, and the use reliability of the rotating shaft assembly can be further improved; and the multiple bearings are located on the same side of the corresponding rotor assembly in the axial direction, the multiple bearings can be completely accommodated in the shaft sleeve, the multiple bearings have no cooperation relationship with the end covers at both ends of the motor, and therefore only the machining precision of the shaft sleeve needs to be ensured, and the machining precision of the end cover does not need to be ensured, so that the manufacturing cost can be reduced. Optionally, the number of bearings is two, the two bearings can effectively improve the support reliability of the rotating shaft assembly, are convenient to accommodate in the shaft sleeve, reduce the number of parts, and save production cost.

[0041] In the above technical solution, the outer wall of the sleeve cooperates with the hollow channel, the inner wall of the sleeve cooperates with the bearing, and the sleeve cooperates with the hollow channel through a concave-convex structure to limit the axial movement of the sleeve relative to the stator assembly.

[0042] The outer wall of the sleeve cooperates with the hollow channel, and the inner wall of the sleeve cooperates with the bearing to ensure the stability of the sleeve position; and the sleeve and the hollow channel cooperate through the concave-convex structure to prevent the sleeve from moving axially relative to the stator assembly, thereby further improving the stability of the sleeve.

[0043] In the above technical solution, the concave-convex structure includes a flange arranged on the outer side wall of the sleeve and a groove arranged on the wall surface of the hollow channel; wherein, the flange is further provided with at least one notch.

[0044] A flange is provided on the outer wall of the sleeve, and a corresponding groove is provided on the wall of the hollow passage. During assembly, the flange fits into the groove, thereby securing the sleeve in place and limiting axial movement of the sleeve along the stator assembly. The flange also has at least one notch, which mates with the recessed and raised surface of the later-molded housing to prevent circumferential rotation of the sleeve relative to the stator assembly, thereby improving sleeve stability. Optionally, there are multiple notches, spaced apart circumferentially along the flange.

[0045] In the above technical solution, a partition is provided on the inner side wall of the sleeve, and the partition is used to separate the two rotating support parts.

[0046] A separator is provided on the inner sidewall of the sleeve to separate the rotational support portions of the two shaft assemblies, thereby effectively preventing interference between the two shaft assemblies and further improving the reliability of the two shaft assemblies. Optionally, the separator is a groove for mounting an annular retaining ring or baffle; the separator can also be an annular protrusion or an integrally formed partition.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 motor sleeve 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, and 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.

[0052] The motor also includes a casing, which is an injection-molded body that covers an insulating frame, a mounting frame, and other structures, so that the insulating frame, the mounting frame, multiple pins, and the sleeve can be fixedly connected to form a whole, thereby 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 covered 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 two 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.

[0053] In the above technical solution, the two outer end surfaces of the housing are respectively provided with circular bosses coaxial with the stator assembly.

[0054] Two circular bosses are provided on the two outer end surfaces of the casing, and the two circular bosses are coaxially connected to the stator assembly, so as to facilitate cooperation with other structures to encapsulate the motor.

[0055] 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.

[0056] 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.

[0057] 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 an axial hole for the shaft assembly to extend out.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] In any of the above technical solutions, the motor further includes: two shaft sleeve packaging covers, fixedly connected to the axial ends of the shaft sleeve, for limiting the axial movement of the rotating shaft assembly.

[0062] Installing sleeve encapsulation caps at the two axial ends of the sleeve can prevent the axial movement of the rotating support portion located within the sleeve, thereby limiting the axial movement of the two rotating shaft assemblies and further improving the reliability of the motor. The sleeve encapsulation caps can be fixedly connected to the sleeve by fasteners such as screws.

[0063] 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.

[0064] The fan provided by the technical scheme of the second aspect of the application has the advantages of compact structure, strong practical functionality, convenient installation, small axial size, and low manufacturing cost, due to the motor provided by any one of the technical schemes of the first aspect.

[0065] Additional aspects and advantages of the application will be made apparent by the following description portion, or will be understood through practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0066] The above and / or additional aspects and advantages of the application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0067] Figure 1 is a partial structural schematic diagram of the motor described in some embodiments of the application;

[0068] Figure 2 is an exploded structural schematic diagram of the motor described in some embodiments of the application;

[0069] Figure 3 is a structural schematic diagram of the stator assembly described in some embodiments of the application;

[0070] Figure 4 is a partial structural schematic diagram of the shaft sleeve described in some embodiments of the application;

[0071] Figure 5 is a partial structural schematic diagram of the motor described in some embodiments of the application;

[0072] Figure 6 is an exploded structural schematic diagram of the rotor described in some embodiments of the application;

[0073] Figure 7 is a structural schematic diagram of the fan described in some embodiments of the application.

[0074] In the drawings, Figures 1 to 7 Correspondence between reference signs in the drawings and component names is as follows:

[0075] 100 - motor; 200 - first fan; 300 - second fan;

[0076] 1 - stator assembly; 11 - stator core; 111 - stator yoke portion; 1111 - clamping slot; 1112 - through hole; 112 - stator tooth portion; 1121 - tooth surface; 1122 - limiting step; 1123 - tooth body; 121 - first winding; 122 - second winding;

[0077] 21 - first rotor assembly; 211 - first rotor disc; 212 - first permanent magnet; 22 - second rotor assembly; 221 - second rotor disc; 2211 - disc body outer portion; 2212 - disc body inner portion; 222 - second permanent magnet;

[0078] 3-sleeve; 31-outer wall; 32-inner wall; 33-flange; 34-notch; 35-groove;

[0079] 41-first rotating shaft assembly; 411-first rotating shaft, 4111-connecting section; 4112-extension section, 412-first rotating support portion; 42-second rotating shaft assembly; 421-second rotating shaft; 422-second rotating support portion;

[0080] 51-first insulating frame; 52-second insulating frame;

[0081] 6-Mounting frame;

[0082] 7-pin;

[0083] 8- housing; 81- tooth portion wrapping surface; 82- first circular boss; 83- second circular boss; 84- step surface;

[0084] 9-Electrical control board;

[0085] 101 - first shaft sleeve packaging cover; 102 - second shaft sleeve packaging cover; 110 - supporting bearing; 131 - first end packaging cover; 132 - second end packaging cover. DETAILED DESCRIPTION

[0086] 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.

[0087] 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.

[0088] Refer to the following Figures 1 to 7 The motor and the fan according to some embodiments of the present invention are described.

[0089] Example 1

[0090] 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.

[0091] Specifically, the stator assembly 1 includes a stator core 11 and two sets of independent windings, such as Figure 2 As shown, a hollow channel is provided in the radial middle of the stator core 11 (such as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown), the stator core 11 is provided with stator teeth protruding toward both axial ends 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 shaft assemblies are coaxially connected to the two rotor assemblies, and protrude along the axial direction of the motor toward the same side away from the stator core 11, and a part of the two shaft assemblies are placed in the hollow channel, as shown in FIG. Figure 1 and Figure 2 shown.

[0092] 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.

[0093] 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 from the stator core 11 to accommodate the two windings, ensuring that the two windings can act independently on the motor 100. A hollow channel is provided in the radial center of the stator core 11, providing favorable axial installation space for the shaft assemblies. Portions of the two shaft assemblies can be inserted into the hollow channel, further shortening the axial dimensions of the motor 100. The two rotor assemblies are coaxially arranged on opposite axial sides of the stator assembly 1, facing the two windings, forming an axial air gap with the stator assembly 1. This ensures that the two rotor assemblies do not interfere with each other and rotate independently. The two shaft assemblies are independent of each other and are coaxially connected to their corresponding rotor assemblies, rotating synchronously with them. The two rotating shaft assemblies protrude toward the same axial side of the motor 100, allowing two mutually non-interfering power outputs from one axial end of the motor 100. This helps shorten the axial distance between the output ends of the motor 100 compared to protruding toward both axial ends of the motor 100. Because the two winding sets 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 two axial ends of the motor 100 can output two mutually independent torques, effectively achieving the functions of two independent motors 100 using a single motor 100. Consequently, the motor 100 has the significant advantages of a compact structure, strong practical functionality, easy installation, small axial dimensions, and low manufacturing cost.

[0094] 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 41, the shaft assembly connected to the second rotor assembly 22 is recorded as the second shaft assembly 42, 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.

[0095] Wherein, the rotating shaft assembly includes a rotating shaft, and the rotating shaft of one rotating shaft assembly is a hollow shaft, such as Figure 1 As shown, the shaft of the other shaft assembly extends through the hollow shaft, as shown in FIG. Figure 1 and Figure 2 As shown, and is suitable for rotating relative to the hollow shaft.

[0096] The shaft assembly includes a shaft. If the shaft of one shaft assembly is hollow, the shaft of the other shaft assembly can extend through the hollow shaft, thereby achieving co-directional projection of the two shaft assemblies. This allows one axial end of the motor 100 to be simultaneously connected to two fans or other components. Optionally, the shaft of the other shaft assembly is solid, which helps to increase the strength of the shaft. Of course, the shaft of the other shaft assembly can also be hollow.

[0097] The shaft assembly with a hollow shaft is recorded as the second shaft assembly 42, the shaft of the second shaft assembly 42 is recorded as the second shaft 421, and the shaft of the first shaft assembly 41 is recorded as the first shaft 411. Optionally, the first shaft 411 is a solid shaft, such as Figure 1 shown.

[0098] Furthermore, the rotating shaft of another rotating shaft assembly (ie, the first rotating shaft assembly 41) includes a connecting section 4111 and an extending section 4112 connected to the connecting section 4111, as shown in FIG. Figure 1 As shown, the outer diameter of the connecting section 4111 is equal to the outer diameter of the hollow shaft, and the connecting section 4111 and the hollow shaft are arranged along the axial direction of the hollow channel, and the extending section 4112 extends through the hollow shaft.

[0099] The shaft of the other shaft assembly includes a connecting section 4111 and an extension section 4112. The outer diameter of the connecting section 4111 is equal to the outer diameter of the hollow shaft, and the connecting section 4111 and the hollow shaft are arranged along the axial direction of the hollow channel. After the two shafts are assembled, the outer contours of the parts in the hollow channel remain flush, so that the structure of the product is relatively regular, easy to process and form, and easy to assemble; at the same time, the part of the shaft connected to the rotor assembly (i.e., the connecting section 4111) is relatively thick, which improves the strength of the shaft and is beneficial to improving the reliability of the shaft; it is also convenient for the two shafts to be supported by the same type of bearings and other supporting structures to improve the reliability and stability of the motor 100.

[0100] Furthermore, if Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the motor 100 further includes: a shaft sleeve 3 , which is disposed in the hollow channel, and a portion of the two rotating shaft assemblies is inserted into the shaft sleeve 3 .

[0101] A shaft sleeve 3 is set in the hollow channel, and one end of the two rotating shaft assemblies is inserted into the shaft sleeve 3. The shaft sleeve 3 can play a good limiting role for the two rotating shaft assemblies, 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 assemblies shaking, tilting, shifting, etc., thereby improving the coaxiality of the two rotating shaft assemblies, which is beneficial to improving the reliability of the motor 100, and is also beneficial to improving the assembly accuracy of the rotating shaft assembly, making installation more convenient.

[0102] Specifically, the shafts of the two shaft assemblies can be nested, one end of the first shaft assembly 41 is inserted into the shaft sleeve 3, and the other end protrudes toward one axial side of the motor 100, one end of the second shaft assembly 42 is inserted into the shaft sleeve 3, and the other end passes through the above-mentioned shaft assembly and protrudes toward the same axial side of the motor 100, and the two shaft assemblies are coaxially connected to the two rotor assemblies respectively, and rotate synchronously with the corresponding rotor assemblies respectively.

[0103] Furthermore, if Figure 1 As shown, the motor 100 further includes: a support bearing 110 coaxially disposed between the output end of the hollow shaft and another rotating shaft.

[0104] By adding a support bearing 110 between the output end of the hollow shaft and the other rotating shaft, the support stiffness of the two rotating shaft assemblies can be further improved, thereby further improving the reliability of the motor 100 .

[0105] 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 3 As 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.

[0106] 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.

[0107] Furthermore, a through hole 1112 adapted to the shaft sleeve 3 of the motor 100 is provided in the radial middle 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 .

[0108] 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.

[0109] Furthermore, a radial outer wall of the stator yoke 111 is provided with a slot 1111, such as Figure 3As 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 .

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 .

[0114] 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.

[0115] Example 2

[0116] The difference from the first embodiment is that: based on the first embodiment, further, as Figure 6As shown, the rotor assembly includes a rotor disk coaxially connected to the shaft assembly 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.

[0117] The rotor assembly includes a rotor disk and permanent magnets. The rotor disk serves as a mounting carrier for the permanent magnets and enables coaxial connection between the rotor assembly and the shaft assembly. 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 shaft assembly assembly based on the specific product structure and providing space for the installation of other components.

[0118] 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 .

[0119] Furthermore, the rotating shaft assembly includes a rotating shaft, and the rotor disk is coaxially connected to the rotating shaft.

[0120] Optionally, the rotor disk and the rotating shaft are an integral structure formed by injection molding.

[0121] Optionally, the rotor disk and the rotating shaft are an integrated structure formed by welding.

[0122] Optionally, the rotor disk is threadedly connected to the rotating shaft.

[0123] Optionally, the rotor disk is interference fit with the rotating shaft.

[0124] The shaft assembly includes a shaft, and the rotor disk is 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. Of course, the shaft and the rotor disk can also be fixedly connected by other methods, such as fasteners.

[0125] Optionally, the permanent magnet is a circular or fan-shaped pie-shaped structure, and there are multiple permanent magnets, which are evenly distributed circumferentially on the axial surface of the rotor disk facing the stator yoke 111 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.

[0126] 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.

[0127] Example 3

[0128] The difference from Example 2 is that: on the basis of Example 2, further, the rotating shaft assembly includes a rotating shaft and a rotating support part, the rotating support part is accommodated in the sleeve 3 and is located between the sleeve 3 and the rotating shaft, and is used to support the rotating shaft and make the rotating shaft suitable for rotating relative to the sleeve 3, and the rotating shaft is coaxially connected to the rotor assembly.

[0129] The rotating shaft assembly includes a rotating shaft and a rotating support part. The rotating support part is accommodated in the shaft sleeve 3 and is located between the shaft sleeve 3 and the rotating shaft to ensure the stability of the rotating shaft position and the stability during rotation; the rotating shaft is coaxially connected to the rotor assembly to realize the power output function of the motor 100.

[0130] Specifically, the rotating shaft and the rotation support portion of the first rotating shaft assembly 41 are respectively recorded as the first rotating shaft 411 and the first rotation support portion 412 , and the rotating shaft and the rotation support portion of the second rotating shaft assembly 42 are respectively recorded as the second rotating shaft 421 and the second rotation support portion 422 .

[0131] Optionally, the rotation support comprises at least one bearing, such as Figure 1 and Figure 2 shown.

[0132] 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 32 of the sleeve 3 to support the rotating shaft. Alternatively, multiple connecting rings can be axially arranged on the inner sidewall 32 of the sleeve 3, with the inner sidewalls of the connecting rings being smooth, to support the rotating shaft.

[0133] Optionally, there are multiple bearings, and the multiple bearings are spaced apart and distributed on the same axial side of the rotor assembly along the length direction of the rotating shaft, such as Figure 1 and Figure 2 shown.

[0134] The plurality of bearings are arranged along the length direction of the rotating shaft, which can support multiple parts of the rotating shaft, improve the support reliability of the rotating support part to the rotating shaft, and further improve the use reliability of the rotating shaft assembly. The plurality of bearings are located on the same side of the corresponding rotor assembly in the axial direction, which facilitates the complete accommodation of the plurality of bearings in the shaft sleeve 3. Therefore, the plurality of bearings do not cooperate with the end covers at both ends of the motor, and only the machining accuracy of the shaft sleeve 3 needs to be ensured, and the machining accuracy of the end cover does not need to be ensured, which facilitates the reduction of manufacturing cost. Optionally, the number of bearings is two, which can effectively improve the support reliability of the rotating shaft assembly, facilitate the accommodation in the shaft sleeve 3, reduce the number of components, and save production cost.

[0135] Further, the outer side wall 31 of the shaft sleeve 3 cooperates with the hollow channel, the inner side wall 32 of the shaft sleeve 3 cooperates with the bearing, and the shaft sleeve 3 cooperates with the hollow channel through the concave-convex structure to limit the axial movement of the shaft sleeve 3 relative to the stator assembly 1.

[0136] The outer side wall 31 of the shaft sleeve 3 cooperates with the hollow channel, the inner side wall 32 of the shaft sleeve 3 cooperates with the bearing, and the shaft sleeve 3 cooperates with the hollow channel through the concave-convex structure to limit the axial movement of the shaft sleeve 3 relative to the stator assembly 1.

[0137] Specifically, the concave-convex structure includes a flange 33 (as shown in Figure 4 ) arranged on the outer side wall 31 of the shaft sleeve 3 and a groove arranged on the wall surface of the hollow channel. Figure 4

[0138] The flange 33 is arranged on the outer side wall 31 of the shaft sleeve 3, and the groove is arranged on the wall surface of the hollow channel. During assembly, the flange 33 is embedded in the groove, which can realize the assembly positioning of the shaft sleeve 3 and limit the axial movement of the shaft sleeve 3 relative to the stator assembly 1. The flange 33 is further provided with at least one notch 34, which can cooperate with the concave-convex structure of the later injection-molded housing, thereby preventing the shaft sleeve 3 from rotating relative to the stator assembly 1, and further improving the stability of the shaft sleeve 3. Optionally, the number of notches 34 is multiple, and the multiple notches 34 are distributed along the circumference of the flange 33.

[0139] Further, the inner side wall 32 of the shaft sleeve 3 is provided with a separation part, which is used to separate the two rotating support parts.

[0140] The separation part is arranged on the inner side wall 32 of the shaft sleeve 3, which can separate the rotating support parts of the two rotating shaft assemblies, thereby effectively preventing the mutual interference of the two rotating shaft assemblies, and further improving the use reliability of the two rotating shaft assemblies.

[0141] Optionally, the separation part is a groove 35 (as shown in​ Figure 4 As shown), it is used to install an annular retaining ring or a baffle; the partition can also be an annular protrusion or an integrally formed partition.

[0142] Example 4

[0143] The difference from the third embodiment is that: based on the third 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.

[0144] 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 .

[0145] 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.

[0146] 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.

[0147] 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 5 shown.

[0148] 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.

[0149] 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 shaft sleeve 3 are fixedly connected into a whole, as shown in FIG. Figure 5As 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.

[0150] 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, the multiple pins 7 and the sleeve 3 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 multiple 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.

[0151] 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.

[0152] 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 5 shown.

[0153] Two circular bosses are provided on the two outer end surfaces of the housing 8 (i.e., the two axial end surfaces of the housing 8 on the radially outer side). The two circular bosses are coaxially connected to the stator assembly 1 to facilitate cooperation with other structures to encapsulate the motor 100. Furthermore, some avoidance notches can be provided on the circular bosses to facilitate assembly or commissioning of the motor 100.

[0154] The circular boss located on one side of the first rotor assembly 21 is denoted as a first circular boss 82 , and the circular boss located on one side of the second rotor assembly 22 is denoted as a second circular boss 83 .

[0155] 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 5 shown.

[0156] A stepped surface 84 is provided at one axial end of the housing 8, near the plurality of pins 7. The plurality of pins 7 extend through the stepped surface 84 and protrude axially from the stepped surface 84 in the stator assembly 1, providing favorable space for connection or installation of the pins 7 with other conductive components. The stepped surface 84 can be provided on the inner sidewall of one of the circular bosses, further simplifying the structure of the housing 8.

[0157] Furthermore, 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 two rotating shaft components to extend out.

[0158] 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.

[0159] The end packaging cover located on one side of the first rotor assembly 21 is recorded as a first end packaging cover 131 , and the end packaging cover located on one side of the second rotor assembly 22 is recorded as a second end packaging cover 132 .

[0160] Furthermore, 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.

[0161] 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.

[0162] Furthermore, if Figure 2 As shown, the motor 100 further includes: two shaft sleeve packaging covers, which are fixedly connected to the axial ends of the shaft sleeve 3 and are used to limit the axial movement of the shaft assembly.

[0163] Installing sleeve encapsulation caps at the two axial ends of the sleeve 3 can prevent the axial movement of the rotating support portion located in the sleeve 3, thereby limiting the axial movement of the two rotating shaft assemblies and further improving the reliability of the motor 100. The sleeve encapsulation caps can be fixedly connected to the sleeve 3 by fasteners such as screws.

[0164] The shaft sleeve packaging cover located at one side of the first rotor assembly 21 is denoted as a first shaft sleeve packaging cover 101 , and the shaft sleeve packaging cover located at one side of the second rotor assembly 22 is denoted as a second shaft sleeve packaging cover 102 .

[0165] like Figure 7 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.

[0166] 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.

[0167] The fan connected to the first rotating shaft assembly 41 is denoted as the first fan 200 , and the fan connected to the second rotating shaft assembly 42 is denoted as the second fan 300 .

[0168] 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”.

[0169] The motor 100 and the fan provided in the present application are described below with reference to a specific example.

[0170] like Figures 1 to 7 As shown, a motor 100 includes: a stator assembly 1, two rotor assemblies (i.e., a first rotor assembly 21 and a second rotor assembly 22), a sleeve 3 and two rotating shaft assemblies (i.e., a first rotating shaft assembly 41 and a second rotating shaft assembly 42).

[0171] 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.

[0172] The stator yoke 111 has a plurality of slots (i.e., slots 1111 ) on the radial outer side for fitting the stator teeth 112 ; the stator yoke 111 has a circular hole slot (i.e., through hole 1112 ) on the radial inner side for installing the shaft sleeve 3 .

[0173] 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.

[0174] 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.

[0175] 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.

[0176] The radial outer side of the first rotor disk 211 is a disc-shaped structure and is fixedly connected to the first rotating shaft 411 by threaded connection. The radial outer side of the second rotor disk 221 is a disc-shaped structure and is fixedly connected to the second rotating shaft 421 by injection molding.

[0177] 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.

[0178] The shaft sleeve 3 is located in the hollow of the stator core 11 , is coaxially fixed, and extends out from both axial sides of the stator yoke 111 .

[0179] The outer wall of the sleeve 3 cooperates with the radial inner circular groove hole of the stator yoke 111, and the inner wall of the sleeve 3 cooperates with the bearings of the first rotating shaft assembly 41 and the second rotating shaft assembly 42. A flange 33 is designed on the radial outer side of the sleeve 3 for axial limitation with the stator yoke 111, and a plurality of small notches 34 are designed evenly distributed radially on the flange 33 for anti-rotation connection; a groove 35 is provided in the middle position of the inner wall of the sleeve 3 for the installation of a retaining ring to separate the first rotating support part 412 and the second rotating support part 422 of the two rotating shaft assemblies.

[0180] The first and second rotating shaft assemblies 41, 42 are coaxially fixedly connected to the first and second rotor assemblies 21, 22, respectively, and output from the same axial side of the motor 100. The first and second rotating shaft assemblies 41, 42 can rotate independently of each other. The first rotating shaft assembly 41 includes a solid shaft and two bearings. The two bearings are coaxially arranged radially outward from the solid shaft and axially spaced on the same side of the axial connection to the first rotor assembly, forming a first rotating support portion 412. The second rotating shaft assembly 42 includes a hollow shaft and two bearings. The two bearings are coaxially arranged radially outward from the hollow shaft and axially spaced on the same side of the axial connection to the second rotor assembly, forming a second rotating support portion 422. The first rotating support portion 412 of the first rotating shaft assembly 41 and the second rotating support portion 422 of the second rotating shaft assembly 42 are located on opposite axial sides of the motor 100 and are completely housed within the shaft sleeve 3.

[0181] 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.

[0182] 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 .

[0183] 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, and sleeve 3 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 both sides (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 designed on the outer axial ends of plastic housing 8, coaxial with stator assembly 1. Plastic housing 8 has a stepped surface 84 on the side where pin 7 resides, with pin 7 protruding a certain distance from stepped surface 84 to provide space for connection or installation of pin 7 with other conductive parts.

[0184] The motor 100 further includes a first sleeve packaging cover 101 and a second sleeve packaging cover 102 . The first sleeve packaging cover 101 and the second sleeve packaging cover 102 are fixed to the ends of the sleeve 3 to limit the axial movement of the first rotating shaft assembly 41 and the second rotating shaft assembly 42 .

[0185] The motor 100 also includes a first end packaging cover 131 and a second end packaging cover 132. The first end packaging cover 131 and the second end packaging cover 132 are coaxially fixedly installed at the axial ends of the plastic housing 8 respectively, for packaging the motor 100, and the end packaging covers and the plastic housing 8 are matched with stoppers.

[0186] 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 131 or between the second rotor assembly 22 and the second end packaging cover 132 on either side of the motor 100 .

[0187] The motor 100 may further include a support bearing 110 , which is coaxially disposed between the output end of the hollow shaft and the solid shaft to increase the support stiffness of the first rotating shaft assembly 41 and the second rotating shaft assembly 42 .

[0188] 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 41 and a second rotating shaft assembly 42 output on the same side of the motor 100. The first fan 200 and the second fan 300 rotate coaxially and independently of each other.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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 are coaxially connected to the two rotor assemblies respectively, and protrude in the same direction away from the stator core along the axial direction of the motor, and a portion of the two rotating shaft assemblies are disposed in the hollow channel; 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. 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.

2. The motor according to claim 1, characterized in that The rotating shaft assembly includes a rotating shaft, wherein the rotating shaft of one rotating shaft assembly is a hollow shaft, and the rotating shaft of the other rotating shaft assembly extends through the hollow shaft and is suitable for rotating relative to the hollow shaft.

3. The motor according to claim 2, characterized in that The rotating shaft of the other rotating shaft assembly includes a connecting section and an extension section connected to the connecting section. The outer diameter of the connecting section is equal to the outer diameter of the hollow shaft, and the connecting section and the hollow shaft are arranged along the axial direction of the hollow channel. The extension section extends through the hollow shaft.

4. The motor according to claim 2, characterized in that Also includes: A shaft sleeve is arranged in the hollow channel, and a part of the two rotating shafts is inserted into the shaft sleeve.

5. The motor according to claim 2, characterized in that Also includes: A support bearing is coaxially arranged between the output end of the hollow shaft and the other rotating shaft.

6. The motor according to any one of claims 1 to 5, characterized in that A through hole adapted to the shaft sleeve 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.

7. The motor according to claim 6, 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.

8. The motor according to claim 7, 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.

9. 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 shaft assembly and a permanent magnet mounted on the rotor disk. The rotor disk includes, from the outside to the inside in 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.

10. The motor according to claim 9, characterized in that The rotating shaft assembly includes a rotating shaft, and the rotor disk is coaxially connected to the rotating shaft; The rotor disk and the 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.

11. The motor according to claim 9, 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 rotor disk facing the stator yoke 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.

12. The motor according to claim 4, characterized in that The rotating shaft assembly includes a rotating shaft and a rotating support portion. The rotating support portion is accommodated in the shaft sleeve and is located between the shaft sleeve and the rotating shaft. It is used to support the rotating shaft and enable the rotating shaft to rotate relative to the shaft sleeve. The rotating shaft is coaxially connected to the rotor assembly.

13. The motor according to claim 12, characterized in that The rotation support includes at least one bearing.

14. The motor according to claim 13, characterized in that There are multiple bearings, and the multiple bearings are distributed at intervals along the length direction of the rotating shaft on the same axial side of the rotor assembly.

15. The motor according to claim 14, characterized in that The outer side wall of the sleeve cooperates with the hollow channel, the inner side wall of the sleeve cooperates with the bearing, and the sleeve cooperates with the hollow channel through a concave-convex structure to limit the axial movement of the sleeve relative to the stator assembly.

16. The motor according to claim 15, characterized in that The concave-convex structure includes a flange provided on the outer side wall of the sleeve and a groove provided on the wall surface of the hollow channel; Wherein, the flange is further provided with at least one notch.

17. The motor according to claim 13, characterized in that A partition is provided on the inner side wall of the sleeve, and the partition is used to space the two rotation support parts apart.

18. The electric machine 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.

19. The motor according to claim 18, 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.

20. The motor according to claim 18, 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 shaft sleeve 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 the axial end faces of the stator core or do not exceed the axial end faces of the stator core.

21. The motor according to claim 20, characterized in that The two outer end surfaces of the housing are respectively provided with circular bosses coaxial with the stator assembly.

22. The motor according to claim 20, 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.

23. The motor according to claim 20, characterized in that Also includes: Two end packaging covers are coaxially fixedly installed on the axial ends of the housing, respectively, for packaging the motor, and are provided with an axial hole for the rotating shaft assembly to extend out.

24. The motor according to claim 23, characterized in that Also includes: The electric control board is built between the rotor assembly and the end packaging cover on either side of the motor.

25. The motor according to claim 4, characterized in that Also includes: Two shaft sleeve packaging covers are fixedly connected to the axial ends of the shaft sleeve and are used to limit the axial movement of the rotating shaft assembly.

26. A fan, characterized in that: include: at least one electric machine according to any one of claims 1 to 25; 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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