Motor and fan

Abstract

The present invention provides a motor and a fan, the motor comprising: a stator assembly, comprising a stator core and two sets of independent windings, a hollow channel being provided in the radial middle of the stator core, stator teeth being provided at the axial ends of the stator core, and two sets of windings being respectively wound on the two sets of stator teeth; two independent rotor assemblies, coaxially arranged on the axial sides of the stator assembly in a back-to-back manner, 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 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 same side direction away from the stator core along the axial direction of the motor. The present application has the advantages of compact structure, strong practical functionality, 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 the quality of life, more functional requirements have been put forward for fans, such as two coaxial fans, which are used in conjunction with corresponding speeds and directions. There are two technologies currently used: one is that two motors are connected to the two fans with their shafts facing away from each other, which is costly and occupies a large axial space; the other is to use a single-axis motor and a gear mechanism to achieve the shaft extension at both ends, and to achieve the fans connected to the two shafts to rotate at a fixed ratio speed and direction, which is limited in its functional diversity and 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 purpose, 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 is provided in the radial middle part of the stator core, and stator teeth protruding to the axial sides thereof are provided at the axial ends of the stator core, and the two groups of windings are respectively wound on the two groups of stator teeth; two independent rotor assemblies are coaxially arranged on the axial sides of the stator assembly in a back-to-back manner 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 shaft assemblies, the shaft assembly comprises a shaft and a rotation support part, the rotation support part is at least partially accommodated in the hollow channel and is sleeved on the shaft, used to support the shaft and make the shaft suitable for rotating relative to the stator core, the two shafts are coaxially connected to the two rotor assemblies respectively, and protrude in the axial direction of the motor in the same side direction away from the stator core.

[0006] The motor provided by the technical solution of the first aspect of the present invention realizes the independent dual-power output of a motor by utilizing the cooperation of a stator assembly with two independent rotor assemblies and two independent rotating shaft assemblies, and can drive two fans to rotate independently at their own speeds and directions without interfering with each other. Compared with the solution in which two motors are connected to two fans with their back-to-back shaft extensions, at least one stator assembly is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compared with the solution in which a single-axis motor and a gear mechanism are cooperated to realize the shaft extensions at both ends, the two fans can rotate at any speed and any direction, which has strong practical functionality, significantly improves the diversification of the fan functionality, and also eliminates the gear mechanism, reducing the difficulty of manufacturing and installing the product.

[0007] Specifically, the motor includes a stator assembly, two independent rotor assemblies and two independent 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, and the two sets of stator teeth protrude toward both sides along the axial direction of the stator core for winding of the two sets of windings, so as to ensure that the two sets of windings can act on the motor independently of each other; a hollow channel is provided in the radial middle of the stator core, which provides a favorable axial installation space for the installation of the shaft assembly, so that a part of the two 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 both axial sides of the stator assembly in a back-to-back manner, facing the two sets of windings respectively, and forming an axial air gap with the stator assembly, so as to ensure that the two rotor assemblies do not interfere with each other and realize independent rotation. The shaft assembly includes a shaft and a rotating support part, and the rotating support part is partially or completely contained in the hollow channel and is sleeved on the shaft to ensure the stability of the shaft position and the stability during rotation; the shaft is coaxially connected with the rotor assembly to realize 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, and rotate synchronously with the corresponding rotor assemblies. The two rotating shaft assemblies protrude to the same axial side of the motor, so that one axial end of the motor can output two non-interfering forces, which is beneficial to shorten the axial distance of the output end of the motor compared to protruding to both axial sides of the motor. Since the two sets 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 two axial ends of the motor can output two independent torques, which is equivalent to using one motor to realize the functions of two independent motors, so it has the significant advantages of compact structure, strong practical functionality, easy installation, small axial size, 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 rotating support part includes at least one bearing. The bearing is used to support the rotating shaft, which can significantly improve the reliability of the rotating shaft. 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 along the circumferential direction on the inner side wall of the hollow channel, and the plurality of needle rollers are used to support the rotating shaft; or a plurality of connecting rings are arranged along the axial direction on the inner side wall of the hollow channel, and the inner side wall of the connecting ring is a smooth surface, and the plurality of connecting rings are used 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 arranged at intervals along the length direction of the rotating shaft, which can support multiple parts of the rotating shaft, which is conducive to improving the support reliability of the rotating support part to the rotating shaft, thereby further improving the reliability of the use of the rotating shaft assembly; and multiple bearings are distributed 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. Optionally, the number of bearings is two, and the two bearings can not only effectively improve the support reliability of the rotating shaft assembly, but also reduce the number of components and save production costs.

[0013] In the above technical solution, the motor further includes: two bearing covers, which are sleeved in the hollow channel and fixedly connected to the stator core, and the two bearing covers are arranged back to back to respectively 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 for 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 and the assembly accuracy of the rotating shaft assembly, making the installation more convenient. The two bearing covers can also act as separators to separate 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 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.

[0016] 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.

[0017] In the above technical solution, the opening 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-convex of the housing to be injected later, so as to prevent 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 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 suitable for rotating relative to the hollow shaft.

[0022] If the rotating shaft of one rotating shaft assembly is a hollow shaft, the rotating shaft of the other rotating shaft assembly can extend through the hollow shaft, thereby realizing the same-direction protrusion of the two rotating shaft assemblies, so that one axial end of the motor can be connected to two fans or other components at the same time. Optionally, the rotating shaft of the other rotating shaft assembly is a solid shaft, which is conducive to improving the strength of the rotating shaft. Of course, the rotating shaft of the other rotating shaft assembly can also be a hollow shaft.

[0023] In the above technical solution, 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, and the extension section extends through the hollow shaft.

[0024] The rotating shaft of the other rotating shaft assembly includes 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 axial direction of the hollow channel. After the two rotating 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 also easy to assemble; at the same time, the part of the rotating shaft connected to the rotor assembly (i.e., the connecting section) is relatively thick, which improves the strength of the rotating shaft and is beneficial to improving the reliability of the rotating shaft; it is also convenient for the two rotating shafts to be supported by supporting structures such as bearings of the same type to improve the reliability and stability of the motor.

[0025] In the above technical solution, the motor further comprises: a support bearing coaxially arranged between the output end of the hollow shaft and the other rotating shaft.

[0026] By adding a support bearing between the output end of the hollow shaft and the other rotating shaft, the support stiffness of the two rotating shaft components can be further improved, thereby further improving the reliability of the motor.

[0027] 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.

[0028] This solution splits the stator core into a stator yoke and multiple stator teeth, which is conducive to reducing the difficulty of processing the stator core and the difficulty of winding the two sets of windings. The stator yoke can be formed by stacking multiple stator punchings, and the stator teeth can also be formed by stacking multiple stator punchings. Of course, the stator core can also be an integrated structure.

[0029] 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.

[0030] Since the multiple stator teeth are arranged along the circumferential direction of the stator yoke, the multiple stator teeth surround 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 dimension of the motor.

[0031] A clamping groove is arranged 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, so as to realize the assembly of the stator yoke and the stator teeth, and the structure is simple, and it is convenient to process and assemble.

[0032] 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, and all the tooth surfaces of any group of the stator teeth are located in the same plane and perpendicular to the axis of the stator yoke portion.

[0033] Any stator tooth portion includes at least one stator tooth, and the stator tooth 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 are 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.

[0034] 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.

[0035] A stator tooth portion includes two stator teeth, and the tooth surfaces of the two stator teeth are respectively located on both sides of the axial direction of the stator yoke portion, and can form an axial air gap with the rotor components on both sides. Compared with the solution in which a stator tooth portion only includes one stator tooth, the number of stator teeth is reduced and the assembly process is simplified. Of course, a stator tooth portion can also include only one stator tooth, and two opposite stator teeth are installed at one part of the stator core to form two stator teeth.

[0036] 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 in 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.

[0037] The rotor assembly includes a rotor disk and a permanent magnet. The rotor disk serves as a mounting carrier for the permanent magnet and realizes the coaxial connection between the rotor assembly and the rotating shaft. The permanent magnet is mounted on the rotor disk to generate a magnetic field that interacts with the stator assembly. The outer part of the rotor disk is a disc-shaped structure with a relatively regular structure, which is convenient for processing and forming, and also convenient for the arrangement of multiple permanent magnets. The inner part of the disk is a disc-shaped structure or a conical structure, which is convenient for the reasonable design of the assembly structure of the rotor disk and the rotating shaft assembly according to the specific structure of the product, and provides a favorable space for the installation of other parts.

[0038] 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.

[0039] 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 fitting, etc., effectively ensuring the connection reliability between the shaft and the rotor disk, thereby ensuring the reliability of the synchronous rotation of the shaft and the rotor assembly.

[0040] In the above technical solution, the permanent magnet is a circular or fan-shaped pancake 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.

[0041] The permanent magnet is a circular or fan-shaped pancake structure, which is easy to arrange and reduces the axial size of the motor. Multiple permanent magnets are evenly distributed on the surface of the rotor disk facing the stator yoke along the circumferential direction of the rotor disk, so that an axial magnetic flux is formed between the rotor assembly and the stator assembly. Among them, the N poles and S poles of two adjacent permanent magnets can be arranged alternately or in a Halbach array, which can be adjusted according to product requirements.

[0042] In any of the above technical solutions, the motor also includes: an insulating frame installed 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.

[0043] The motor also includes an insulating frame, a mounting frame and a plurality of pins. 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 is fixedly connected to the insulating frame and is provided with a plurality of pins. The lead wires of the two sets of windings are fixedly connected to the plurality of pins, thereby leading the lead wires of the two sets of windings to a fixed and stable conductive carrier.

[0044] 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.

[0045] 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, so that the structure of the motor is relatively regular, and it is not easy to interfere with the internal magnetic field of the motor, and it is easy to connect with external circuits.

[0046] In the above technical solution, the motor also includes: a casing, which 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, and both axial end surfaces of the casing include an inner end surface and an outer end surface connected to the outer edge of the inner end surface, and 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 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 or do not exceed the axial end surfaces of the stator core.

[0047] The motor also includes a casing, which is an injection molded body, covering an insulating frame, a mounting frame and other structures, so that the insulating frame, the mounting frame, a plurality of pins and two bearing covers can be fixedly connected to form a whole, thereby ensuring the stability of the motor; 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, thereby ensuring that these components are covered within the radial outer surface of the casing, thereby ensuring the integrity and regularity of the motor appearance and its insulation from the outside. At the same time, the two axial end faces of the casing are not regular planes, but a stepped structure with a high outer side and a low inner side. The protruding part located on the radial outer side is recorded as the outer end face, which is relatively small in size; the concave part located on the inner side is recorded as the inner end face, which is relatively large in size. Among them, 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 (i.e., the two sets of tooth surfaces of the stator core), which facilitates more accurate and effective control of the axial air gap between the tooth surface and the permanent magnet.

[0048] In the above technical solution, a step surface is provided at one axial end of the housing close to the plurality of the pins, and the plurality of the pins penetrate the step surface and protrude from the step surface along the axial direction of the stator assembly.

[0049] A step surface is provided at one axial end of the housing near the plurality of pins, so that the plurality of pins pass through the step surface and protrude from the step surface along the axial direction of the stator assembly, which can provide a favorable space for the connection or installation of the pins and other conductive parts. The step surface can be provided on the inner side wall of the circular boss, further simplifying the housing structure.

[0050] 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.

[0051] The end packaging caps are installed at both axial ends of the housing to ensure the integrity of the motor and effectively protect the internal structure of the motor; and the end packaging caps are provided with shaft holes for the corresponding rotating shafts to extend out, ensuring that the power of the motor can be output. A step is formed between the outer wall of the circular boss and the outer wall of the housing, and the end packaging caps can be provided with cover edges that fit the step, making the outer contour of the motor more regular.

[0052] In the above technical solution, the end packaging cover is provided with a bearing chamber for accommodating the corresponding bearing located axially outside of the rotating shaft assembly.

[0053] The two end packaging covers are provided with bearing chambers to support the axially outer bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the outside of the motor), which can further support and limit the two rotating support parts, thereby further improving the reliability of the two rotating shaft assemblies. In addition, the bearing chamber is integrated into the end packaging cover, so that the end packaging cover also plays the role of the bearing cover. Compared with the solution of additionally providing a bearing cover and then fixing it on the end packaging cover, the number of parts is reduced, the assembly process is simplified, and the production cost is reduced.

[0054] Optionally, the middle part of the end packaging cover is first sunken to form a sink, and the bottom wall of the sink is partially reversely convex to form a boss, and the space defined by the boss is the bearing chamber. Furthermore, the inner part of the rotor disk corresponding to the end packaging cover is configured as a conical inclined surface structure to fit the end packaging cover. In this way, the inner space of the hollow channel can be reasonably utilized, which is conducive to further reducing the axial size of the motor.

[0055] 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.

[0056] 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. An annular groove is provided on the edge of the end packaging cover. The circular boss is embedded in the annular groove to achieve stopper fit, thereby achieving the assembly of the end packaging cover in place. The structure is simple and the assembly is convenient.

[0057] In the above technical solution, the motor further comprises: an electric control board, which is built between the rotor assembly and the end packaging cover on any side of the motor.

[0058] The setting of the electric control board is conducive to realizing the automatic control of the motor; the electric control board is set on either side of the motor and located between the rotor assembly and the end packaging cover on that side, which not only ensures the stability of the electric control board, but also facilitates the line output of the electric control board.

[0059] 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.

[0060] 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.

[0061] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0063] Figure 1 is a schematic diagram of a partial structure of a motor according to some embodiments of the present invention;

[0064] Figure 2 is a schematic diagram of an exploded structure of a motor according to some embodiments of the present invention;

[0065] Figure 3 is a schematic structural diagram of a stator assembly according to some embodiments of the present invention;

[0066] Figure 4 is a partial structural schematic diagram of a bearing cover according to some embodiments of the present invention;

[0067] Figure 5 is a partial structural schematic diagram of an end packaging cover according to some embodiments of the present invention;

[0068] Figure 6 is a schematic diagram of a partial structure of a motor according to some embodiments of the present invention;

[0069] Figure 7 is a schematic diagram of a partial exploded structure of a rotor according to some embodiments of the present invention;

[0070] Figure 8 It is a schematic diagram of the structure of the fan described in some embodiments of the present invention.

[0071] in, Figures 1 to 8 The corresponding relationship between the reference numerals and component names in the figure is:

[0072] 100-motor; 200-first fan; 300-second fan;

[0073] 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;

[0074] 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;

[0075] 31-first rotating shaft assembly; 311-first rotating shaft; 3111-connecting section; 3112-extension section; 312-first rotating support portion; 32-second rotating shaft assembly; 321-second rotating shaft; 322-second rotating support portion;

[0076] 41-first bearing cap; 411-outer wall; 412-inner wall; 413-flange; 414-notch; 42-second bearing cap;

[0077] 51-first insulating frame; 52-second insulating frame;

[0078] 6-Mounting frame;

[0079] 7-pin;

[0080] 8- housing; 81- tooth portion wrapping surface; 82- first circular boss; 83- second circular boss; 84- step surface;

[0081] 9-Electrical control board;

[0082] 101 - first end packaging cover; 102 - second end packaging cover; 1021 - bearing chamber; 1022 - annular groove; 110 - support bearing. DETAILED DESCRIPTION

[0083] In order to more clearly understand the above-mentioned purpose, 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 the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0084] 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0085] Refer to the following Figures 1 to 8 The motor and the fan according to some embodiments of the present invention are described.

[0086] Embodiment 1

[0087] like Figure 1 and Figure 2 As shown, the motor 100 provided by the embodiment of the first aspect of the present invention comprises: a stator assembly 1, two independent rotor assemblies and two independent shaft assemblies.

[0088] 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 2As shown, the two axial ends of the stator core 11 are provided with stator teeth protruding toward the axial sides thereof, as shown in FIG. Figure 3 As shown, two groups of windings are respectively wound on two groups 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, the shaft assembly includes a shaft and a rotation support portion, the rotation support portion is at least partially accommodated in the hollow channel and sleeved on the shaft, used to support the shaft and make the shaft suitable for rotating relative to the stator core 11, the two shafts are coaxially connected to the two rotor assemblies, and protrude in the same side 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.

[0089] The motor 100 provided in the embodiment of the first aspect of the present invention utilizes a stator assembly 1 in cooperation with two independent rotor assemblies and two independent rotating shaft assemblies to realize dual-power independent output of a motor 100, and can drive two fans to rotate independently at their own speeds and directions without interfering with each other. Compared with the solution in which two motors 100 are connected to two fans with their backs to the shaft extension, at least one stator assembly 1 is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compared with the solution in which a single-axis motor 100 and a gear mechanism are cooperated to realize the shaft extension at both ends, the two fans are realized to rotate at any speed and any direction, the practical functionality is strong, the diversification of the fan functionality is significantly improved, the gear mechanism is omitted, and the difficulty of manufacturing and installing the product is reduced.

[0090] 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, and the two sets of stator teeth protrude toward both sides along the axial direction of the stator core 11 for the two sets of windings to be wound, so as to ensure that the two sets of windings can act on the motor 100 independently of each other; a hollow channel is provided in the radial middle of the stator core 11, which provides a favorable axial installation space for the installation of the shaft assembly, so that a part of the two shaft assemblies can 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 in a back-to-back manner, facing the two sets of windings respectively, and forming an axial air gap with the stator assembly 1, so as to ensure that the two rotor assemblies do not interfere with each other and realize independent rotation. The rotating shaft assembly includes a rotating shaft and a rotating support part, the rotating support part is partially or completely contained in the hollow channel, and is sleeved on the rotating shaft to ensure the stability of the rotating shaft position and the stability during the rotation process; 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 protrude to the same side of the axial direction of the motor 100, so that one axial end of the motor 100 can output two non-interfering powers, which is beneficial to shorten the axial distance of the output end of the motor 100 compared to protruding to both sides of the axial direction 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 two 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, so it has the significant advantages of compact structure, strong practical functionality, convenient installation, small axial size, and low manufacturing cost.

[0091] 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.

[0092] Specifically, the rotating shaft and the rotation support part of the first rotating shaft assembly 31 are respectively recorded as the first rotating shaft 311 and the first rotating support part 312 , and the rotating shaft and the rotation support part of the second rotating shaft assembly 32 are respectively recorded as the second rotating shaft 321 and the second rotating support part 322 .

[0093] Optionally, the rotation support comprises at least one bearing, such as Figure 1 and Figure 2 shown.

[0094] The rotating support part includes at least one bearing. The bearing is used to support the rotating shaft, which can significantly improve the reliability of the rotating shaft. 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 along the circumferential direction on the inner side wall of the hollow channel, and the plurality of needle rollers are used to support the rotating shaft; or a plurality of connecting rings are arranged along the axial direction on the inner side wall of the hollow channel, and the inner side wall of the connecting ring is a smooth surface, and the plurality of connecting rings are used to support the rotating shaft.

[0095] 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.

[0096] 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 supporting reliability of the rotating shaft by the rotating support part, 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 supporting 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.

[0097] 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.

[0098] 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 respectively.

[0099] 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 for 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 the installation more convenient; and the two bearing covers can act as separators, spacing the rotating support parts of the two rotating shaft assemblies apart, thereby effectively preventing the two rotating shaft assemblies from interfering with each other, further improving the reliability of the two rotating shaft assemblies.

[0100] 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 .

[0101] Further, 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.

[0102] The bearing cover is adapted to the bearing in form, so that the axially inner bearings 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.

[0103] Furthermore, the opening end of the bearing cover is provided with a flange 413 extending radially outward, such as Figure 4 shown.

[0104] The open end of the bearing cover is provided with a flange 413 which extends radially outwards and can cooperate with the housing 8 which is injected later to play a certain limiting role and prevent the bearing cover from axially moving relative to the stator core 11.

[0105] Furthermore, at least one notch 414 is provided on the flange 413. Figure 4 shown.

[0106] At least one notch 414 is provided on the flange 413, and the notch 414 can be matched with the housing 8 which is injected later, so as to prevent the bearing cover from rotating circumferentially relative to the stator assembly 1, thereby improving the stability of the bearing cover. Optionally, there are multiple notches 414, and the multiple notches 414 are distributed at intervals along the circumference of the flange 413.

[0107] Furthermore, the rotating shaft of one of the rotating shaft assemblies is a hollow shaft, such as Figure 1 As shown, the shaft of another 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.

[0108] If the shaft of one of the shaft assemblies is a hollow shaft, the shaft of the other shaft assembly can extend through the hollow shaft, thereby achieving the same-direction protrusion of the two shaft assemblies, so that one axial end of the motor 100 can be connected to two fans or other components at the same time. Optionally, the shaft of the other shaft assembly is a solid shaft, which is conducive to improving the strength of the shaft. Of course, the shaft of the other shaft assembly can also be a hollow shaft.

[0109] Specifically, the shaft assembly whose shaft is a hollow shaft is recorded as the second shaft assembly 32, the shaft of the second shaft assembly 32 is recorded as the second shaft 321, and the shaft of the first shaft assembly 31 is recorded as the first shaft 311. Optionally, the first shaft 311 is a solid shaft, such as Figure 1 shown.

[0110] Furthermore, the rotating shaft of another rotating shaft assembly (ie, the first rotating shaft assembly 31) includes a connecting section 3111 and an extending section 3112 connected to the connecting section 3111. Figure 1 As shown, the outer diameter of the connecting section 3111 is equal to the outer diameter of the hollow shaft, and the connecting section 3111 and the hollow shaft are arranged along the axial direction of the hollow channel, and the extending section 3112 extends through the hollow shaft.

[0111] The shaft of another shaft assembly includes a connecting section 3111 and an extending section 3112. The outer diameter of the connecting section 3111 is equal to the outer diameter of the hollow shaft, and the connecting section 3111 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 also easy to assemble; at the same time, the part of the shaft connected to the rotor assembly (i.e., the connecting section 3111) 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 supporting structures such as bearings of the same type to improve the reliability and stability of the motor 100.

[0112] Furthermore, if Figure 1 As shown, the motor 100 further includes: a support bearing 110, which is coaxially arranged between the output end of the hollow shaft and another rotating shaft.

[0113] 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 components can be further improved, thereby further improving the reliability of the motor 100.

[0114] 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, a plurality of stator teeth 112 are assembled with a stator yoke 111 to form a stator core 11, and the plurality of 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.

[0115] This solution splits the stator core 11 into a stator yoke 111 and a plurality of stator teeth 112, which is conducive to reducing the difficulty of processing the stator core 11 and reducing the difficulty of winding the two sets of windings. Among them, the stator yoke 111 can be formed by stacking a plurality of stator punching sheets, and the stator teeth 112 can also be formed by stacking a plurality of stator punching sheets. Of course, the stator core 11 can also be an integrated structure.

[0116] 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 .

[0117] 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 set 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.

[0118] 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 .

[0119] A slot 1111 is provided on the radial outer side wall of the stator yoke 111 , and the stator teeth 112 can be clamped on the stator yoke 111 by means of the slot 1111 , thereby realizing the assembly of the stator yoke 111 and the stator teeth 112 , and the structure is simple, and it is convenient for processing and assembly.

[0120] 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.

[0121] Any stator tooth portion 112 includes at least one stator tooth, and the stator tooth 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.

[0122] 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 .

[0123] A stator tooth portion 112 includes two stator teeth, and the tooth surfaces 1121 of the two stator teeth are respectively located on the axial sides of the stator yoke portion 111, and can form an axial air gap with the rotor components on both sides. Compared with the solution in which a stator tooth portion 112 includes only one stator tooth, the number of stator teeth 112 is reduced and the assembly process is simplified. Of course, a stator tooth portion 112 can also include only one stator tooth, and two opposite stator teeth 112 are installed at one part of the stator core 11 to form two stator teeth.

[0124] Embodiment 2

[0125] The difference from the first embodiment is that: on the basis of 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 in its radial direction, an outer disk body 2211 and an inner disk body 2212 connected to the outer disk body 2211, wherein the outer disk body 2211 is a disc-shaped structure, and the inner disk body 2212 is a disc-shaped structure or a conical structure.

[0126] The rotor assembly includes a rotor disk and a permanent magnet. The rotor disk serves as a mounting carrier for the permanent magnet and realizes the coaxial connection between the rotor assembly and the rotating shaft. The permanent magnet is mounted on the rotor disk to generate a magnetic field that interacts with the stator assembly 1. Among them, the outer disk body 2211 of the rotor disk is a disc-shaped structure, which is relatively regular and convenient for processing and forming, and also convenient for the arrangement of multiple permanent magnets; the inner disk body 2212 is a disc-shaped structure or a conical structure, which is convenient for the reasonable design of the assembly structure of the rotor disk and the rotating shaft assembly according to the specific structure of the product, and provides a favorable space for the installation of other parts.

[0127] Specifically, the rotor disk and the permanent magnet of the first rotor assembly 21 are respectively recorded as the first rotor disk 211 and the first permanent magnet 212 , and the rotor disk and the permanent magnet of the second rotor assembly 22 are respectively recorded as the second rotor disk 221 and the second permanent magnet 222 .

[0128] Optionally, the rotor disk and the rotating shaft are an integral structure formed by injection molding.

[0129] Optionally, the rotor disk and the rotating shaft are an integrated structure formed by welding.

[0130] Optionally, the rotor disk is threadedly connected to the rotating shaft.

[0131] Optionally, the rotor disk is interference fit with the rotating shaft.

[0132] The shaft assembly includes a shaft, which is coaxially connected with the shaft 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 connection reliability between the shaft and the rotor disk, thereby ensuring the reliability of 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.

[0133] Optionally, the permanent magnet is a circular or fan-shaped pancake 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.

[0134] The permanent magnet is a circular or fan-shaped pancake structure, which is convenient for arrangement and reduces the axial size of the motor 100. Multiple permanent magnets are evenly distributed on the surface of the rotor disk facing the stator yoke 111 along the circumferential direction of the rotor disk, so that an axial magnetic flux is formed between the rotor assembly and the stator assembly 1. Among them, the N poles and S poles of two adjacent permanent magnets can be arranged alternately or in a Halbach array, which can be adjusted according to product requirements.

[0135] Embodiment 3

[0136] The difference from the second embodiment is that: on the basis of the second embodiment, further, 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.

[0137] Specifically, the insulating frame is installed 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 .

[0138] 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 lead wires of the two sets of windings to a fixed and stable conductive carrier.

[0139] 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 , and the mounting frame 6 is fixedly connected to one of the insulating frames.

[0140] 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.

[0141] 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, and it is convenient to connect with external circuits.

[0142] 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.

[0143] The motor 100 also includes a casing 8, which is an injection-molded body, covering 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 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, thereby ensuring that these components are covered within the radial outer surface of the casing 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 two axial end faces of the casing 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 protruding part on the radial outside is recorded as the outer end surface, which is relatively small in size; the concave part on the inner side is recorded as the inner end surface, which is relatively large in size, such as Figure 2 and Figure 5 shown.

[0144] Among them, the two inner end faces (that is, the two axial end faces on the radial inner side of the casing 8) are flush with or do not exceed the two axial end faces 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 surface and the permanent magnet.

[0145] Furthermore, the housing 8 is provided with a step surface 84 at one axial end close to the plurality of pins 7, and 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, as shown in FIG. Figure 6shown.

[0146] 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 penetrate the step surface 84 and protrude from the step surface 84 along the axial direction of the stator assembly 1, thereby providing a favorable space for the connection or installation of the pins 7 with other conductive parts.

[0147] Furthermore, if Figure 1 and Figure 2 As shown, the motor 100 further includes: two end packaging covers, which are coaxially fixedly installed at the axial ends of the housing 8, respectively, for packaging the motor 100, and are provided with shaft holes for corresponding rotating shafts to extend out.

[0148] The end packaging caps are installed at both axial ends of the housing 8 to ensure the integrity of the motor 100 and effectively protect the internal structure of the motor 100; and the end packaging caps are provided with shaft holes for the corresponding rotating shafts to extend out, so as to ensure that the power of the motor 100 can be output. Among them, a step is formed between the outer wall surface of the circular boss and the outer wall surface of the housing 8, and the end packaging caps can be provided with cover edges that are just adapted to the step, so that the outer contour of the motor 100 is relatively regular.

[0149] The end packaging cover located at one side of the first rotor assembly 21 is denoted as a first end packaging cover 101 , and the end packaging cover located at one side of the second rotor assembly 22 is denoted as a second end packaging cover 102 .

[0150] 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.

[0151] The bearing chambers 1021 are arranged on the two end packaging covers to support the axially outer bearings of the two rotating shaft assemblies (i.e., the bearings relatively close to the outside of the motor 100), which can further support and limit the two rotating support parts, thereby further improving the reliability of the two rotating shaft assemblies. In addition, the bearing chambers 1021 are integrated into the end packaging covers, so that the end packaging covers also play the role of bearing covers. Compared with the solution of additionally arranging bearing covers and then fixing them on the end packaging covers, the number of parts is reduced, the assembly process is simplified, and the production cost is reduced.

[0152] Alternatively, if Figure 5 As shown, the middle part of the end packaging cover is first sunken to form a sink, and the bottom wall of the sink is partially reversed to form a boss, and 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. In this way, the internal space of the hollow channel can be reasonably utilized, which is beneficial to further reduce the axial size of the motor 100.

[0153] 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, the edge of the end packaging cover is provided with an annular groove 1022, and the circular boss is embedded in the corresponding annular groove 1022. Figure 1 shown.

[0154] Two outer end faces of the casing (that is, the two axial end faces on the radial outer side of the casing 8) are provided with two circular bosses, which are coaxially connected to the stator assembly, and an annular groove 1022 is provided on the edge of the end packaging cover. The circular boss is embedded in the annular groove 1022 to achieve stopper fit, thereby achieving the assembly of the end packaging cover in place, with a simple structure and convenient assembly.

[0155] The circular boss located on one side of the first rotor assembly 21 is denoted as the first circular boss 82, and the circular boss located on one side of the second rotor assembly 22 is denoted as the second circular boss 83. Further, 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.

[0156] 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 any side of the motor 100.

[0157] 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 line output of the electric control board 9.

[0158] 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.

[0159] The fan provided by the embodiment of the second aspect of the present invention comprises 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.

[0160] The fan connected to the first rotating shaft assembly 31 is denoted as the first fan 200 , and the fan connected to the second rotating shaft assembly 32 is denoted as the second fan 300 .

[0161] In this manual, Figure 1The extending direction of the central axis is referred to as the “axial direction”, the direction surrounding the central axis is referred to as the “circumferential direction”, and the direction perpendicular to the central axis is referred to as the “radial direction”.

[0162] The motor 100 and the fan provided in the present application are described below with reference to a specific example.

[0163] 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).

[0164] 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.

[0165] The stator yoke 111 has a plurality of slots (i.e., slots 1111) on the radially outer side for mating installation of the stator teeth 112; the stator yoke 111 has a circular hole slot (i.e., through hole 1112) on the radially 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.

[0166] A single stator tooth portion 112 has at least one tooth body 1123 and at least one tooth surface 1121. After the multiple stator tooth portions 112 are installed in cooperation 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 cooperation, 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.

[0167] The first rotor assembly 21 and the second rotor assembly 22 are coaxially rotatably disposed outside the axial sides of the stator assembly 1 in a back-to-back manner, 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.

[0168] The first rotor disk 211 and the second rotor disk 221 have substantially the same structure. One of the rotor disks is used 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 plane or a conical inclined surface structure, which provides a favorable space for the installation of other parts.

[0169] The radial outer side of the rotor disk is a disc-shaped structure and is fixedly connected to the corresponding rotating shaft by means of a threaded connection.

[0170] The first permanent magnet 212 and the second permanent magnet 222 are circular or sector-shaped pancake structures and are evenly distributed circumferentially on the axial surface of the rotor disk 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.

[0171] The first rotating shaft assembly 31 and the second rotating shaft assembly 32 are coaxially fixedly connected to the first rotor assembly 21 and the second rotor assembly 22, respectively, and are coaxially outputted from the same axial side of the motor 100. The first rotating shaft assembly 31 and the second rotating shaft assembly 32 can rotate independently of each other. The first rotating shaft assembly 31 includes a solid shaft and two bearings, which are coaxially arranged on the radial outer side of the solid shaft and are disposed on both axial sides of the first rotating shaft assembly 31, forming a first rotating support portion 312; the second rotating shaft assembly 32 includes a hollow shaft and two bearings, which are coaxially arranged on the radial outer side of the hollow shaft and are disposed on both axial sides of the second rotating shaft assembly 32, 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 disposed on both axial sides of the motor 100, and are partially or completely contained in the radial hollow of the stator assembly 1.

[0172] The motor 100 further includes two bearing caps (i.e., a first bearing cap 41 and a second bearing cap 42), which are coaxially fixedly connected to the stator assembly 1 and are disposed in the circular hole groove of the stator yoke 111 with the back opening facing outward, and are used to support the bearings of the first rotating shaft assembly 31 and the second rotating shaft assembly 32 close to the inside of the motor 100. The first bearing cap 41 and the second bearing cap 42 are thin-walled cylindrical structures, and the first bearing cap 41 is used as an example for specific description. The outer wall 411 of the first bearing cap 41 matches with the circular groove hole on the radial inner side of the stator yoke 111, and the inner wall 412 of the first bearing cap 41 matches with the bearing of the first rotating shaft assembly 31; a small flange 413 is designed on the radial outer side of the first bearing cap 41, and a plurality of small notches 414 are radially evenly designed on the flange 413 for anti-rotation connection.

[0173] The motor 100 further includes a first insulating frame 51 and a second insulating frame 52 mounted on the tooth body 1123 of the stator tooth, a mounting frame 6 fixedly connected to the first insulating frame 51 or the second insulating frame 52, and a plurality of pins 7 inserted into the mounting frame 6. The lead wires of the first winding 121 and the second winding 122 are fixedly connected to the plurality of pins 7, so that the lead wires of the first winding 121 and the second winding 122 are led out to a fixed and stable conductive carrier.

[0174] The mounting frame 6 is an arc-shaped strip structure coaxial with the stator. The mounting frame 6 and a plurality of pins 7 are located radially outside the first rotor assembly 21 and the second rotor assembly 22 .

[0175] The motor 100 further includes a plastic housing 8, which fixedly connects the stator assembly 1, the first insulating frame 51 and the second insulating frame 52, the mounting frame 6, the plurality of pins 7, the first bearing cover 41 and the second bearing cover 42 into a whole. The outer diameter of the plastic housing 8 is larger than the maximum radial outer contour surface formed by the stator assembly 1, the first insulating frame 51 and the second insulating frame 52, the mounting frame 6, and the plurality of pins 7; the wrapping surfaces of the stator teeth 112 on both axial sides (i.e., the axial end surfaces of the housing 8) are flush with or do not exceed the two sets of tooth surfaces 1121 of the stator assembly 1; two cylindrical bosses (i.e., circular bosses) coaxial with the stator assembly 1 are designed on the outer sides of the axial ends of the plastic housing 8; the plastic housing 8 is provided with a step surface 84 on the side where the pin 7 is located, and the pin 7 is exposed from the step surface 84 by a certain distance, so as to provide space for the pin 7 to be connected or installed with other conductive parts.

[0176] The motor 100 further includes a first end packaging cover 101 and a second end packaging cover 102, which respectively pass through the first rotating shaft 311 and the second rotating shaft 321, and are respectively coaxially fixedly installed at the axial ends of the plastic housing 8, and are used to support the bearings of the first rotating shaft assembly 31 and the second rotating shaft assembly 32 close to the outside of the motor 100, and to package the motor. Taking the second end packaging cover 102 as an example for specific description, the outer side of the second end packaging cover 102 is designed with a stopper (i.e., an annular groove 1022) that matches the cylindrical boss of the plastic housing (i.e., the second circular boss 83), and the radial inner side is designed with a bearing chamber 1021 that sinks toward the inner side of the motor body, so that the bearing is sunk into the inner side of the second end packaging cover 102 to reduce the overall axial size of the motor 100.

[0177] 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 any side of the motor 100 .

[0178] 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 31 and the second rotating shaft assembly 32 .

[0179] 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 coaxially fixedly connected to a first rotating shaft assembly 31 and a second rotating shaft assembly 32 outputted from both sides of the motor 100, respectively. The first fan 200 and the second fan 300 coaxially rotate independently of each other.

[0180] 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.

[0181] In summary, the motor provided by the present invention utilizes a stator assembly with two independent rotor assemblies and two independent rotating shaft assemblies to realize dual-power independent output of a motor, and can drive two fans to rotate independently at their own speeds and directions without interfering with each other. Compared with the solution of two motors connecting two fans with their back-to-back shafts, at least one stator assembly is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compared with the solution of a single-axis motor and a gear mechanism cooperating to realize the shaft extensions at both ends, the two fans can rotate at any speed and any direction, which has strong practical functionality, significantly improves the diversification of the fan functionality, and also eliminates the gear mechanism, reducing the difficulty of manufacturing and installing the product.

[0182] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0183] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “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 orientation, and therefore, cannot be understood as a limitation on the present invention.

[0184] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0185] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor, characterized in that: include: The stator assembly comprises a stator core and two sets of independent windings, wherein a hollow channel is provided in the radial middle of the stator core, and stator teeth protruding to both axial sides of the stator core are provided at both axial ends of the stator core, and the two sets of windings are respectively wound on the two sets of stator teeth; Two independent rotor assemblies are coaxially arranged on both axial sides of the stator assembly and facing away from each other, 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, the rotating shaft assemblies 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, and used to support the rotating shaft and enable the rotating shaft to rotate 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 the same direction away from the stator core; 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. The two groups of windings are respectively wound on the stator teeth on the axial sides of the stator yoke.

2. The motor according to claim 1, characterized in that The rotation support includes at least one bearing.

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

4. The motor according to claim 3, characterized in that Also includes: 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 to respectively support the corresponding bearings located axially inward of the rotating shaft assembly.

5. The motor according to claim 4, 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.

6. The motor according to claim 5, characterized in that The opening end of the bearing cover is provided with a flange extending radially outward.

7. The motor according to claim 6, characterized in that At least one notch is arranged on the flange.

8. The electric machine according to any one of claims 1 to 7, characterized in that 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 suitable for rotating relative to the hollow shaft.

9. The motor according to claim 8, characterized in that The rotating shaft of the other rotating shaft assembly includes a connecting section and an extending 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, and the extending section extends through the hollow shaft.

10. The motor according to claim 8, characterized in that Also includes: A support bearing is coaxially arranged between the output end of the hollow shaft and the other rotating shaft.

11. The electric machine according to any one of claims 1 to 7, 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 is embedded in the clamping groove, so that the stator tooth is clamped and matched with the stator yoke.

12. The motor according to claim 11, 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.

13. The motor according to claim 12, 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.

14. The electric machine according to any one of claims 1 to 7, 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, wherein 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, wherein the outer disk body is a disc-shaped structure, and the inner disk body is a disc-shaped structure or a conical structure.

15. The motor according to claim 14, 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 or interference-fitted with the rotating shaft.

16. The motor according to claim 14, characterized in that The permanent magnet is a circular or fan-shaped pancake structure. There are multiple permanent magnets, and 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.

17. The electric machine according to any one of claims 1 to 7, 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.

18. The electric machine according to claim 17, 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.

19. The motor according to claim 17, 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, and both axial end surfaces of the casing include an inner end surface and an outer end surface connected to the outer edge of the inner end surface, and 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 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 or do not exceed the axial end surfaces of the stator core.

20. The electric machine according to claim 19, 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.

21. The electric machine according to claim 19, characterized in that Also includes: Two end packaging covers are coaxially fixedly installed at the two axial ends of the housing, respectively, for packaging the motor, and are provided with shaft holes for the corresponding rotating shafts to extend out.

22. The electric machine according to claim 21, characterized in that The end packaging cover is provided with a bearing chamber for accommodating the corresponding bearing located axially outside the rotating shaft assembly.

23. The electric machine according to claim 21, 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.

24. The electric machine according to claim 21, 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. A fan, characterized in that: include: At least one electric machine according to any one of claims 1 to 24; The two fans are respectively fixedly connected to the two rotating shaft assemblies of the motor, and the two fans rotate coaxially and independently of each other.

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