CN112436697A - Motor and fan - Google Patents

Abstract

The invention provides a motor and a fan, wherein the motor comprises: the stator assembly comprises a stator core and two groups of mutually independent windings, wherein two axial end parts of the stator core are provided with stator teeth protruding towards two axial sides of the stator core, and the two groups of windings are respectively wound on the two groups of stator teeth; the two mutually independent rotor assemblies are arranged on two axial sides of the stator assembly in a back-to-back coaxial mode and form an axial air gap with the stator assembly, and the two rotor assemblies are configured to rotate independently; and the two mutually independent rotating shaft assemblies are coaxially connected with the two rotor assemblies respectively and convexly extend towards the direction far away from the stator core along the axial direction of the motor. This application has realized the double dynamical independent output of a motor, can drive two fans with respective rotational speed and turn to independent rotation, mutual noninterference has reduced the axial dimension of fan, has reduced the cost of fan, and practical function is strong, is showing the diversification that has promoted fan functionality, has also saved gear mechanism, has reduced the manufacturing installation degree of difficulty of product.

Description

Motor and fan

Technical Field

The invention relates to the field of fans, in particular to a motor and a fan comprising the motor.

Background

With the increasing demand of quality of life, fans are also required to have more functions, such as two coaxial fans, which are used in cooperation with corresponding rotating speed and rotating direction. The currently adopted technologies are two types: one is that two motors extend back to the shaft, and the two shafts are respectively connected with two fans, so that the cost is high and the axial occupied space is large; the other is that a single-shaft motor is matched with a gear mechanism to realize shaft extension at two ends, and a fan connected with two shafts rotates at a fixed proportioning rotating speed and in a steering way, so that the diversity of the functionality is limited, and the manufacturing and the installation are difficult.

Disclosure of Invention

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

Another object of the present invention is to provide a fan including the above motor.

In order to achieve the above object, a first aspect of the present invention provides a motor, including: the stator assembly comprises a stator core and two groups of mutually independent windings, wherein two axial end parts of the stator core are provided with stator teeth protruding towards two axial sides of the stator core, and the two groups of windings are respectively wound on the two groups of stator teeth; the two mutually independent rotor assemblies are arranged on two axial sides of the stator assembly in a back-to-back coaxial mode and form an axial air gap with the stator assembly, and the two rotor assemblies are configured to rotate independently; and the two mutually independent rotating shaft assemblies are respectively and coaxially connected with the two rotor assemblies and extend outwards along the axial direction of the motor.

According to the motor provided by the technical scheme of the first aspect of the invention, the double-power independent output of the motor is realized by utilizing the matching of the stator component, the two mutually independent rotor components and the two mutually independent rotating shaft components, and the two fans can be driven to independently rotate at respective rotating speeds and rotating directions without mutual interference. Compared with the scheme that two motors are respectively connected with two fans in a manner of extending back to the shaft, at least one stator assembly is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compare in a unipolar motor and gear mechanism and cooperate the scheme that realizes both ends axle extension, realized that two fans rotate with arbitrary rotational speed and turn to wantonly, practical function is strong, is showing the diversification that has promoted fan functionality, has also saved gear mechanism, has reduced the manufacturing installation degree of difficulty of product.

Specifically, the electric machine includes a stator assembly, two mutually independent rotor assemblies, and two mutually independent shaft assemblies. The stator component comprises a stator core and two groups of mutually independent windings; stator teeth are arranged at two axial end portions of the stator core, and the two groups of stator teeth are convexly extended towards two sides along the axial direction of the stator core to be wound by the two groups of windings, so that the two groups of windings can act on the motor independently. Two rotor components are coaxial setting in stator module's axial both sides dorsad, face two sets of windings respectively, form the axial air gap with stator module, guarantee two rotor components mutual noninterference, realize mutual independence rotation. The two rotating shaft assemblies are mutually independent, are respectively and coaxially connected with the corresponding rotor assemblies and respectively rotate synchronously with the corresponding rotor assemblies. Wherein, two pivot subassemblies can be protruding the stretching to the axial both sides of motor respectively, also can be protruding the stretching to the axial homonymy of motor. Because two sets of windings of stator module are mutually independent, two rotor subassemblies are mutually independent, and two pivot subassemblies are mutually independent, therefore the axial both ends of motor can export two mutually independent torques, utilize a motor to realize the function of two mutually independent motors in other words, so have compact structure, practical function nature strong, simple to operate, axial dimension is little, low in manufacturing cost is showing the advantage.

In addition, the motor in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical scheme, a hollow channel is arranged at the radial middle part of the stator core, and a part of each of the two rotating shaft assemblies is arranged in the hollow channel.

The radial middle part of the stator core is provided with a hollow channel, so that a favorable axial installation space is provided for the installation of the rotating shaft assemblies, and one part of the two rotating shaft assemblies can be inserted into the hollow channel, so that the axial size of the motor is further shortened.

In the above technical solution, the motor further includes: the shaft sleeve is arranged in the hollow channel, and part of the two rotating shaft assemblies is inserted in the shaft sleeve.

Set up the axle sleeve in the cavity passageway, with the equal cartridge of the one end of two pivot subassemblies in the axle sleeve, the axle sleeve can play good limiting displacement to two pivot subassemblies, mutual noninterference between two pivot subassemblies and the stator module has been guaranteed, and reduced the pivot subassembly and taken place the probability of rocking, the slope, the condition such as aversion, thereby improve the axiality of two pivot subassemblies, be favorable to improving the use reliability of motor, also be favorable to improving the assembly precision of pivot subassembly simultaneously, it is more convenient to install. Specifically, one end of one rotating shaft assembly is inserted into the shaft sleeve, the other end of the rotating shaft assembly protrudes to one axial side of the motor, one end of the other rotating shaft assembly is inserted into the shaft sleeve, the other end of the rotating shaft assembly protrudes to the other axial side of the motor, and the two rotating shaft assemblies are respectively coaxially connected with the two rotor assemblies and respectively rotate synchronously with the corresponding rotor assemblies.

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

Two pivot subassemblies are protruding the stretching towards the axial both sides of motor along the axial of motor respectively for the axial both ends of motor all can output power, and the power mutual noninterference of motor both ends output has richened the functional of motor.

Of course, the two rotating shaft assemblies can also protrude towards the same axial side of the motor along the axial direction of the motor, so that one axial end of the motor can output two torques, and the rotating shafts of the two rotating shaft assemblies can be nested.

In any one of the above technical solutions, the stator core includes a stator yoke portion and a plurality of stator tooth portions arranged along a circumferential direction of the stator yoke portion, the plurality of stator tooth portions and the stator yoke portion are assembled to form the stator core, the plurality of stator tooth portions protrude towards two axial sides of the stator yoke portion to form two sets of the stator teeth, and the two sets of the windings are respectively wound around the stator teeth on the two axial sides of the stator yoke portion.

This scheme becomes stator yoke portion and a plurality of stator tooth portion with the stator core split, has both been favorable to reducing stator core's the processing degree of difficulty, is favorable to reducing the wire winding degree of difficulty of two sets of windings again. The stator yoke portion can be formed by laminating a plurality of stator punching sheets, and the stator tooth portion can also be formed by laminating a plurality of stator punching sheets. Of course, the stator core may be of a unitary structure.

In the above technical solution, a through hole adapted to a shaft sleeve of the motor is provided in a radial middle portion of the stator yoke, and the through hole constitutes a part of a hollow passage of the stator core; and/or, the radial lateral wall of stator yoke portion is equipped with the draw-in groove, the local embedding of stator tooth portion in the draw-in groove, make stator tooth portion with stator yoke portion joint cooperation.

Because a plurality of stator tooth portions are arranged along the circumferential direction of the stator yoke portion, a certain hollow space is defined by the plurality of stator tooth portions, a through hole is formed in the radial middle of the stator yoke portion, the through hole and the hollow space form a hollow channel, a favorable axial installation space can be provided for the rotating shaft assembly, and therefore the axial size of the motor is shortened.

Set up the draw-in groove at the radial lateral wall of stator yoke portion, utilize the draw-in groove can be with stator tooth portion joint on stator yoke portion to realize the equipment of stator yoke portion and stator tooth portion, and simple structure, the processing of being convenient for, the assembly of also being convenient for.

In the above technical solution, any one of the stator tooth portions includes at least one of the stator teeth, 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, and all the tooth surfaces of any one set of the stator teeth are located in the same plane and perpendicular to the axis of the stator yoke.

Any stator tooth part comprises at least one stator tooth, the stator tooth comprises a tooth body and a tooth surface, and the tooth surface is connected with the axial end, away from the stator yoke part, of the tooth body and is located on one axial side of the stator yoke part; all tooth surfaces of any one group of stator teeth are positioned in the same plane and are perpendicular to the axis of the stator yoke part, and an axial air gap can be formed between the tooth surfaces and the rotor assembly on the side.

In the above technical solution, the stator tooth portion includes two stator teeth, and a tooth body of the stator tooth portion is provided with a limiting step, and the limiting step abuts against the stator yoke portion and is used for limiting the axial movement of the stator tooth portion relative to the stator yoke portion.

One stator tooth part comprises two stator teeth, and tooth surfaces of the two stator teeth are respectively positioned on two axial sides of the stator yoke part and can form an axial air gap with rotor assemblies on two sides. Compared with the scheme that one stator tooth part only comprises one stator tooth, the number of the stator tooth parts is reduced, and the assembly process is simplified. Of course, a stator tooth portion may include only one stator tooth, and two opposite stator tooth portions are installed at one portion of the stator core to form two stator teeth.

In any one of the above technical solutions, the rotor assembly includes a rotor disc coaxially connected to the rotating shaft assembly and a permanent magnet mounted on the rotor disc, the rotor disc includes, along a radial direction thereof, a disc outer portion and a disc inner portion connected to the disc outer portion, wherein the disc outer portion is a disc-shaped structure, and the disc inner portion is a disc-shaped structure or a cone-shaped structure.

The rotor assembly comprises a rotor disc and a permanent magnet, the rotor disc is used as a mounting carrier of the permanent magnet, and the rotor assembly is coaxially connected with the rotating shaft assembly; permanent magnets are mounted on the rotor disk and generate a magnetic field that interacts with the stator assembly. The outer part of the rotor disc is of a disc-shaped structure, the structure is regular, the processing and forming are convenient, and the arrangement of a plurality of permanent magnets is also convenient; the interior of the disc body is of a disc-shaped structure or a conical structure, so that the assembling structure of the disc body and the rotating shaft component can be conveniently and reasonably designed according to the specific structure of a product, and a favorable space is provided for the installation of other parts.

In the above technical solution, the rotating shaft assembly includes a rotating shaft, and the rotor disc is coaxially connected with the rotating shaft; the rotor disc and the rotating shaft are of an integrated structure formed by injection molding or welding, or the rotor disc and the rotating shaft are in threaded connection or interference fit.

The rotating shaft component comprises a rotating shaft, the rotor disc is coaxially connected with the rotating shaft and fixed together in an injection molding or welding molding mode to form an integrated structure, or fixed connection is realized in threaded connection, interference assembly and other modes, the connection reliability of the rotating shaft and the rotor disc is effectively guaranteed, and the reliability of synchronous rotation of the rotating shaft and the rotor component is guaranteed.

In the technical scheme, the permanent magnets are of a circular or fan-shaped cake-shaped structure, the number of the permanent magnets is multiple, and the multiple permanent magnets are uniformly distributed on the axial surface of the rotor disc facing the stator yoke in the circumferential direction to form axial magnetic flux; the N poles and the S poles of the two adjacent permanent magnets are alternately arranged or arranged in a Halbach array.

The permanent magnets are in a circular or fan-shaped cake-shaped structure, so that the arrangement is convenient, the axial size of the motor is reduced, and the plurality of permanent magnets are uniformly distributed on the surface of the rotor disc facing the stator yoke part along the circumferential direction of the rotor disc, so that axial magnetic flux is formed between the rotor assembly and the stator assembly. The N poles and the S poles of the two adjacent permanent magnets can be alternately arranged or arranged in a Halbach array, and the adjustment can be specifically carried out according to the product requirement.

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

The rotating shaft assembly comprises a rotating shaft and a rotating supporting part, and the rotating supporting part is accommodated in the shaft sleeve and is positioned between the shaft sleeve and the rotating shaft, so that the stability of the position of the rotating shaft and the stability in the rotating process are ensured; the rotating shaft is coaxially connected with the rotor assembly, so that the power output function of the motor is realized.

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

The rotation support part comprises at least one bearing, and the bearing is used for supporting the rotating shaft, so that the use reliability of the rotating shaft can be obviously improved. Of course, the rotation support portion is not limited to the bearing, and may have another structure. Such as: a plurality of roller pins are arranged on the inner side wall of the shaft sleeve along the circumferential direction, and the rotating shaft is supported by the plurality of roller pins; or, a plurality of connecting rings are axially arranged on the inner side wall of the shaft sleeve, the inner side wall of each connecting ring is a smooth surface, and the rotating shaft is supported by the connecting rings.

In the above technical solution, the number of the bearings is plural, and the plural bearings are distributed at the same side of the rotor assembly in the axial direction at intervals along the length direction of the rotating shaft.

The bearings are arranged at intervals along the length direction of the rotating shaft, so that a plurality of parts of the rotating shaft can be supported, the supporting reliability of the rotating supporting part on the rotating shaft is improved, and the use reliability of the rotating shaft assembly is further improved; and a plurality of bearings are located the axial homonymy of the rotor subassembly that corresponds, are convenient for a plurality of bearings to hold in the axle sleeve completely, and then a plurality of bearings do not have the cooperation relation with the end cover at motor both ends, therefore only need concentrate on guarantee the machining precision of axle sleeve can, and need not guarantee the machining precision of end cover to be favorable to reducing manufacturing cost. Optionally, the number of the bearings is two, and the two bearings can effectively improve the supporting reliability of the rotating shaft assembly, are convenient to accommodate in the shaft sleeve, reduce the number of parts and save the production cost.

In the above technical solution, the outer side wall of the shaft sleeve is matched with the hollow channel, the inner side wall of the shaft sleeve is matched with the bearing, and the shaft sleeve is matched with the hollow channel through a concave-convex structure to limit the axial movement of the shaft sleeve relative to the stator assembly.

The outer side wall of the shaft sleeve is matched with the hollow channel, and the inner side wall of the shaft sleeve is matched with the bearing, so that the stability of the position of the shaft sleeve is ensured; and the shaft sleeve is matched with the hollow channel through the concave-convex structure, so that the shaft sleeve can be prevented from moving along the axial direction relative to the stator assembly, and the stability of the shaft sleeve is further improved.

In the above technical solution, the concave-convex structure includes a flange disposed on an outer side wall of the shaft sleeve and a groove disposed on a wall surface of the hollow passage; wherein, the flange still is equipped with at least one breach.

Set up the flange on the lateral wall of axle sleeve, set up the recess on the corresponding wall at hollow passage, then make during the assembly flange embedding recess, can realize the assembly positioning of axle sleeve, restriction axle sleeve along stator module's axial displacement. Wherein, the flange still is equipped with at least one breach, but the breach can be with the later stage mould plastics can unsmooth cooperation to prevent that the axle sleeve from for stator module circumferential direction, and then improving the stability of axle sleeve. Optionally, the number of the notches is multiple, and the multiple notches are distributed at intervals along the circumferential direction of the flange.

In the above technical solution, a partition portion is provided on an inner side wall of the shaft sleeve, and the partition portion is used for separating the two rotation support portions at an interval.

Set up the partition portion on the inside wall of axle sleeve, utilize the partition portion can separate the rotation support portion interval of two pivot subassemblies to effectively prevent two pivot subassemblies mutual interference, further improved the use reliability of two pivot subassemblies. Optionally, the partition is a groove for mounting an annular retaining ring or baffle; the partition may also be an annular projection or an integrally formed baffle.

In any one of the above technical solutions, the motor further includes: an insulating frame mounted on the stator teeth; the mounting rack is fixedly connected to the insulating frame; the plurality of contact pins are inserted into the mounting rack, and the outgoing lines of the two groups of windings are fixedly connected to the plurality of contact pins.

The motor also comprises an insulating frame, a mounting rack and a plurality of contact pins, wherein the insulating frame is arranged on the stator teeth, so that the safety and the reliability of windings arranged on the stator teeth are ensured; the mounting bracket is fixedly connected with the insulating frame and provided with a plurality of contact pins in an inserting mode, and outgoing lines of the two groups of windings are fixedly connected to the contact pins, so that the appearance heads of the two groups of windings are led out to a fixed and stable conductive carrier.

In the above technical solution, the mounting bracket is coaxial with the arc-shaped strip structure of the stator assembly, and the mounting bracket and the plurality of pins are located at the radial outer side of the rotor assembly.

The mounting bracket is coaxial in stator module's arc strip structure, and mounting bracket and a plurality of contact pin are located the radial outside of two rotor subassemblies for the structure of motor is regular relatively, and is difficult for disturbing the internal magnetic field of motor, is convenient for simultaneously be connected with external line.

In the above technical solution, the motor further includes: the casing is an injection molded body, the insulating frame, the mounting frame, the plurality of contact pins and the shaft sleeve are fixedly connected into a whole, 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 contact pins, the two axial end surfaces of the casing respectively comprise an inner end surface and an outer end surface connected with the outer edge of the inner end surface, the outer end surface is positioned on the radial outer side of the inner end surface and at least partially protrudes out of the inner end surface, so that the two axial end surfaces of the casing form a step-shaped structure with a high outer end and a low inner end, and the two inner end surfaces are flush with or not more than the two axial end surfaces of the stator core.

The motor also comprises a shell which is an injection molded body and is coated with structures such as an insulating frame, a mounting frame and the like, so that the insulating frame, the mounting frame, a plurality of contact pins and a shaft sleeve can be fixedly connected to form a whole, and the stability of the motor is ensured; and the outer diameter of the machine shell is larger than the maximum radial outer contour surface formed by the stator assembly, the insulating frame, the mounting frame and the plurality of contact pins, so that the parts are coated in the radial outer surface of the machine shell, and the integrity, the regularity and the insulation between the motor appearance and the outside are ensured. Meanwhile, two axial end faces of the shell are not regular planes but are of a step-shaped structure with high outside and low inside, and the part protruding from the radial outside is marked as an outer end face, so that the size is relatively small; the recessed portion on the inner side is referred to as an inner end surface, and is relatively large in size. The two inner end surfaces are flush with the two axial end surfaces of the stator core or do not exceed the two axial end surfaces of the stator core (namely two groups of tooth surfaces of the stator core), so that the axial air gap between the tooth surfaces and the permanent magnet can be controlled more accurately and effectively.

In the above technical solution, two outer end faces of the casing are respectively provided with two circular bosses coaxial with the stator assembly.

Two outer terminal surfaces of casing are equipped with two circular bosss, and two circular bosss are connected with stator module coaxial, are convenient for with other structure cooperations, encapsulate the motor.

In the technical scheme, a step surface is arranged at one axial end, close to the plurality of contact pins, of the machine shell, and the contact pins penetrate through the step surface and protrude out of the step surface along the axial direction of the stator assembly.

The step surface is arranged at one axial end of the machine shell close to the plurality of contact pins, so that the plurality of contact pins penetrate through the step surface and protrude out of the step surface along the axial direction of the stator assembly, and a favorable space can be provided for connection or installation of the contact pins and other conductive parts. Wherein, the step surface can be arranged on the inner side wall of the circular boss, thereby further simplifying the structure of the machine shell.

In the above technical solution, the motor further includes: two tip encapsulation covers, coaxial fixed mounting respectively in the axial both ends of casing are used for the encapsulation the motor, and are equipped with and supply two the shaft hole that the pivot subassembly stretches out.

End part packaging covers are arranged at two axial ends of the shell, so that the integrity of the motor is ensured, and the internal structure of the motor is effectively protected; and the end part packaging cover is provided with a shaft hole for the corresponding rotating shaft to extend out, so that the power of the motor can be output. Wherein, form the step between the outer wall of circular boss and the outer wall of casing, the tip encapsulation lid can set up the lid and follow, just with this step adaptation for the outline of motor is comparatively regular.

In the above technical solution, the motor further includes: and the electric control board is arranged between the rotor assembly on any side of the motor and the end part packaging cover.

The arrangement of the electric control board is beneficial to realizing the automatic control of the motor; the electric control board is arranged on any side of the motor and is positioned between the rotor assembly on the side and the end part packaging cover, so that the stability of the electric control board is ensured, and the circuit output of the electric control board is facilitated.

In any one of the above technical solutions, the motor further includes: and the two shaft sleeve packaging covers are fixedly connected to the axial port of the shaft sleeve and used for limiting the axial movement of the rotating shaft assembly.

The shaft sleeve packaging covers are mounted at two axial ports of the shaft sleeve, so that axial movement of the rotating support part in the shaft sleeve can be prevented, the effect of limiting the two rotating shaft assemblies to axially move is achieved, and the use reliability of the motor is further improved. The shaft sleeve packaging cover can be fixedly connected with the shaft sleeve through fasteners such as screws.

The technical solution of the second aspect of the present invention provides a fan, including: at least one electric machine according to any one of the aspects of the first aspect; and the two fans are fixedly connected with the two rotating shaft assemblies of the motor respectively, and the two fans rotate coaxially and independently.

The fan provided by the technical scheme of the second aspect of the invention has the remarkable advantages of compact structure, strong practical functionality, convenient installation, small axial size, low manufacturing cost and the like because of comprising the motor in any one of the technical schemes of the first aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a partial structure of an electric machine according to some embodiments of the present invention;

FIG. 2 is an exploded view of an electric machine according to some embodiments of the present invention;

FIG. 3 is a schematic structural view of a stator assembly according to some embodiments of the present invention;

FIG. 4 is a partial schematic structural view of a bushing according to some embodiments of the invention;

FIG. 5 is a schematic view of a portion of an electric machine according to some embodiments of the present invention;

FIG. 6 is an exploded view of a rotor according to some embodiments of the present invention;

fig. 7 is a schematic structural diagram of a wind turbine according to some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100-a motor; 200-a first fan; 300-a second fan;

1-a stator assembly; 11-a stator core; 111-a stator yoke; 1111-card slot; 1112-a through hole; 112-stator teeth; 1121-tooth flank; 1122-a limit step; 1123-tooth body; 121 — a first winding; 122 — a second winding;

21-a first rotor assembly; 211-a first rotor disc; 212-a first permanent magnet; 22-a second rotor assembly; 221-a second rotor disk; 2211-the exterior of the tray body; 2212-the interior of the tray body; 222-a second permanent magnet;

3-shaft sleeve; 31-an outer sidewall; 32-an inner side wall; 33-a flange; 34-a notch; 35-a trench;

41-a first rotating shaft assembly; 411-first rotation axis, 412-first rotation support part; 42-a second spindle assembly; 421-a second rotating shaft, 422-a second rotating support part;

51-a first insulating frame; 52-a second insulating frame;

6-mounting a frame;

7-inserting a pin;

8-a plastic housing; 81-tooth wrap face; 82-a first circular boss; 83-a second circular boss; 84-step surface;

9-an electric control board;

101-a first sleeve package cover; 102-second bushing encapsulation cover; 131-a first end encapsulation cover; 132-second end encapsulation cover.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A motor and a fan according to some embodiments of the present invention will be described with reference to fig. 1 to 7.

Example one

As shown in fig. 1 and 2, an embodiment of the first aspect of the present invention provides a motor 100, including: stator module 1, two mutually independent rotor subassemblies and two mutually independent pivot subassemblies.

Specifically, the stator assembly 1 includes a stator core 11 and two sets of windings independent of each other, as shown in fig. 2, two axial ends of the stator core 11 are provided with stator teeth protruding to two axial sides thereof, as shown in fig. 3, the two sets of windings are respectively wound on the two sets of stator teeth; the two mutually independent rotor assemblies are coaxially arranged on two axial sides of the stator assembly 1 in a back-to-back mode, an axial air gap is formed between the two mutually independent rotor assemblies and the stator assembly 1, and the two rotor assemblies are configured to rotate independently; the two independent rotating shaft assemblies are coaxially connected to the two rotor assemblies, respectively, and protrude in a direction away from the stator core 11 in the axial direction of the motor 100, as shown in fig. 1 and 2.

The motor 100 provided in the embodiment of the first aspect of the present invention utilizes the cooperation of one stator assembly 1, two mutually independent rotor assemblies and two mutually independent rotating shaft assemblies to realize the dual-power independent output of one motor 100, and can drive two fans to rotate independently at respective rotating speeds and rotating directions without interfering with each other. Compared with the scheme that two motors 100 are respectively connected with two fans in a manner of extending back to the shaft, at least one stator assembly 1 is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compare in a unipolar motor 100 and gear mechanism cooperation and realize the scheme that both ends axle stretched, realized that two fans rotate with arbitrary rotational speed and turn to wantonly, practical function is strong, is showing the diversification that has promoted fan functionality, has also saved gear mechanism, has reduced the manufacturing installation degree of difficulty of product.

Specifically, the motor 100 includes a stator assembly 1, two rotor assemblies independent of each other, and two rotating shaft assemblies independent of each other. The stator assembly 1 comprises a stator core 11 and two groups of mutually independent windings; stator teeth are arranged at two axial end portions of the stator core 11, and two groups of stator teeth protrude towards two sides along the axial direction of the stator core 11 to be wound by two groups of windings, so that the two groups of windings can act on the motor 100 independently. Two rotor components are coaxial setting in stator module 1's axial both sides dorsad, face two sets of windings respectively, form the axial air gap with stator module 1, guarantee that two rotor components do not interfere with each other, realize mutual independent rotation. The two rotating shaft assemblies are mutually independent, are respectively and coaxially connected with the corresponding rotor assemblies and respectively rotate synchronously with the corresponding rotor assemblies. The two rotating shaft assemblies may respectively protrude to two axial sides of the motor 100, or protrude to the same axial side of the motor 100. Because stator module 1's two sets of windings are mutually independent, two rotor subassemblies are mutually independent, and two pivot subassemblies are mutually independent, therefore two mutually independent torques can be exported at the axial both ends of motor 100, utilize a motor 100 to realize two mutually independent motor 100's function in other words, so have compact structure, practical function nature strong, simple to operate, axial dimension is little, low in manufacturing cost's showing advantage.

The two rotor assemblies may be respectively referred to as a first rotor assembly 21 and a second rotor assembly 22, the rotating shaft assembly connected to the first rotor assembly 21 is referred to as a first rotating shaft assembly 41, the rotating shaft assembly connected to the second rotor assembly 22 is referred to as a second rotating shaft assembly 42, the winding engaged with the first rotor assembly 21 is referred to as a first winding 121, and the winding engaged with the second rotor assembly 22 is referred to as a second winding 122.

Further, a hollow passage is provided in a radially middle portion of the stator core 11, as shown in fig. 1, 2, 3, and 5, and a portion of each of the two rotary shaft assemblies is disposed in the hollow passage, as shown in fig. 1.

The radial middle part of the stator core 11 is provided with a hollow channel, which provides a favorable axial installation space for the installation of the rotating shaft components, so that a part of the two rotating shaft components can be inserted into the hollow channel, thereby further shortening the axial size of the motor 100.

Of course, the hollow passage may be eliminated, i.e., the radially middle portion of the stator core 11 may also be of a solid structure.

Alternatively, the two rotating shaft assemblies respectively protrude toward both sides of the motor 100 in the axial direction of the motor 100, as shown in fig. 1 and 2.

The two rotating shaft assemblies respectively protrude towards the two axial sides of the motor 100 along the axial direction of the motor 100, so that the two axial ends of the motor 100 can output power, the power output by the two ends of the motor 100 is not interfered with each other, and the functionality of the motor 100 is enriched.

Of course, the two rotating shaft assemblies may also protrude toward the same axial side of the motor 100 along the axial direction of the motor 100, so that one axial end of the motor 100 can output two torques, and the rotating shafts of the two rotating shaft assemblies can be nested.

Further, as shown in fig. 1, 2, 4 and 5, the motor 100 further includes: the shaft sleeve 3 is arranged in the hollow channel, and part of the two rotating shaft assemblies is inserted in the shaft sleeve 3.

Set up axle sleeve 3 in the cavity passageway, with the equal cartridge of one end of two pivot subassemblies in axle sleeve 3, axle sleeve 3 can play good limiting displacement to two pivot subassemblies, mutual noninterference between two pivot subassemblies and stator module 1 has been guaranteed, and reduced the pivot subassembly and taken place to rock, the slope, the probability of the circumstances such as aversion, thereby improve the axiality of two pivot subassemblies, be favorable to improving motor 100's use reliability, also be favorable to improving the assembly precision of pivot subassembly simultaneously, it is more convenient to install.

Specifically, one end of the first rotating shaft assembly 41 is inserted into the shaft sleeve 3, the other end protrudes to one axial side of the motor 100, one end of the second rotating shaft assembly 42 is inserted into the shaft sleeve 3, the other end protrudes to the other axial side of the motor 100, and the two rotating shaft assemblies are respectively coaxially connected with the two rotor assemblies and respectively rotate synchronously with the corresponding rotor assemblies.

Further, the stator core 11 includes a stator yoke portion 111 and a plurality of stator teeth portions 112 arranged along the circumferential direction of the stator yoke portion 111, as shown in fig. 3, the plurality of stator teeth portions 112 and the stator yoke portion 111 are assembled to form the stator core 11, and the plurality of stator teeth portions 112 protrude towards two axial sides of the stator yoke portion 111 to form two sets of stator teeth, and two sets of windings are respectively wound around the stator teeth arranged on the two axial sides of the stator yoke portion 111.

According to the scheme, the stator core 11 is split into the stator yoke portion 111 and the plurality of stator tooth portions 112, so that the processing difficulty of the stator core 11 is reduced, and the winding difficulty of two groups of windings is reduced. The stator yoke portion 111 may be formed by laminating a plurality of stator laminations, and the stator tooth portion 112 may also be formed by laminating a plurality of stator laminations. Of course, the stator core 11 may be of an integral structure.

Further, the radially intermediate portion of the stator yoke portion 111 is provided with a through hole 1112 that fits the sleeve 3 of the motor 100, and as shown in fig. 3, the through hole 1112 constitutes a part of the hollow passage of the stator core 11.

Since the plurality of stator teeth 112 are arranged along the circumferential direction of the stator yoke 111, the plurality of stator teeth 112 enclose a certain hollow space, and therefore, the through hole 1112 is provided at the radial middle part of the stator yoke 111, and the through hole 1112 and the hollow space form a hollow channel, which can provide a favorable axial installation space for the rotating shaft assembly, thereby shortening the axial size of the motor 100.

Further, a radial outer side wall of the stator yoke 111 is provided with a slot 1111, as shown in fig. 3, a part of the stator tooth portion 112 is inserted into the slot 1111, so that the stator tooth portion 112 is snap-fitted to the stator yoke 111.

Set up draw-in groove 1111 at stator yoke portion 111's radial lateral wall, utilize draw-in groove 1111 can be with stator tooth 112 joint on stator yoke portion 111 to realize stator yoke portion 111 and stator tooth 112's equipment, and simple structure, the processing of being convenient for, the assembly of also being convenient for.

Wherein, any stator tooth part 112 includes at least one stator tooth, the stator tooth includes a tooth body 1123 and a tooth surface 1121 which is connected to one end in the axial direction of the tooth body 1123 and is located at one side in the axial direction of the stator yoke 111, and all the tooth surfaces 1121 of any set of stator teeth are located in the same plane and are perpendicular to the axis of the stator yoke 111.

Any stator tooth 112 includes at least one stator tooth, the stator tooth includes a tooth body 1123 and a tooth surface 1121, and the tooth surface 1121 is connected to an axial end of the tooth body 1123 away from the stator yoke 111, and thus is located on one axial side of the stator yoke 111; all tooth flanks 1121 of any set 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 that side.

Further, the stator tooth portion 112 includes two stator teeth, and a tooth body 1123 of the stator tooth portion 112 is provided with a limiting step 1122, as shown in fig. 3, the limiting step 1122 abuts against the stator yoke portion 111 to limit the axial movement of the stator tooth portion 112 relative to the stator yoke portion 111.

One stator tooth portion 112 includes two stator teeth, and tooth surfaces 1121 of the two stator teeth are located at both axial sides of the stator yoke portion 111, respectively, and may form an axial air gap with the rotor assembly at both sides. Compared with a scheme that one stator tooth part 112 only comprises one stator tooth, the number of the stator tooth parts 112 is reduced, and the assembly process is simplified. Of course, one stator tooth portion 112 may include only one stator tooth, and two stator tooth portions 112 are installed in a portion of the stator core 11 in opposite directions to form two stator teeth.

Example two

The difference from the first embodiment is that: on the basis of the first embodiment, as shown in fig. 6, the rotor assembly includes a rotor disc coaxially connected to the rotating shaft assembly and permanent magnets mounted on the rotor disc, the rotor disc includes, from the outside to the inside in the radial direction, a disc outer portion 2211 and a disc inner portion 2212 connected to the disc outer portion 2211, wherein the disc outer portion 2211 is a disc-shaped structure, and the disc inner portion 2212 is a disc-shaped structure or a cone-shaped structure.

The rotor assembly comprises a rotor disc and a permanent magnet, the rotor disc is used as a mounting carrier of the permanent magnet, and the rotor assembly is coaxially connected with the rotating shaft assembly; the permanent magnets are mounted on the rotor disc and generate a magnetic field to interact with the stator assembly 1. The outer part 2211 of the rotor disc is of a disc-shaped structure, the structure is regular, the processing and the forming are convenient, and the arrangement of a plurality of permanent magnets is also convenient; the disk interior 2212 is a disk-shaped structure or a conical structure, so that the assembling structure of the rotor disk and the rotating shaft component can be designed reasonably according to the specific structure of a product, and a favorable space is provided for the installation of other parts.

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

Further, the rotating shaft assembly comprises a rotating shaft, and the rotor disc is coaxially connected with the rotating shaft.

Wherein, optionally, the rotor disc and the rotating shaft are in an injection molding integral structure.

Optionally, the rotor disc and the rotating shaft are of a welded and formed integral structure.

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

Optionally, the rotor disk is an interference fit with the rotating shaft.

The rotating shaft component comprises a rotating shaft, the rotor disc is coaxially connected with the rotating shaft and fixed together in an injection molding or welding molding mode to form an integrated structure, or fixed connection is realized in threaded connection, interference assembly and other modes, the connection reliability of the rotating shaft and the rotor disc is effectively guaranteed, and the reliability of synchronous rotation of the rotating shaft and the rotor component is guaranteed. Of course, the rotating shaft and the rotor disk may be fixedly connected by other methods, such as a fastener connection, etc.

Optionally, the permanent magnets are in a circular or fan-shaped pie structure, the number of the permanent magnets is multiple, and the multiple permanent magnets are circumferentially and uniformly distributed on the axial surface of the rotor disc facing the stator yoke 111 to form axial magnetic flux; the N poles and S poles of two adjacent permanent magnets are alternately arranged or arranged in a Halbach array.

The permanent magnets are in a circular or fan-shaped pie structure, so that the arrangement is convenient, the axial size of the motor 100 is reduced, and a plurality of permanent magnets are uniformly distributed on the surface of the rotor disc facing the stator yoke part 111 along the circumferential direction of the rotor disc, so that axial magnetic flux is formed between the rotor assembly and the stator assembly 1. The N poles and the S poles of the two adjacent permanent magnets can be alternately arranged or arranged in a Halbach array, and the adjustment can be specifically carried out according to the product requirement.

EXAMPLE III

The difference from the second embodiment is that: on the basis of the second embodiment, the rotating shaft assembly further comprises a rotating shaft and a rotating support part, the rotating support part is accommodated in the shaft sleeve 3 and is located between the shaft sleeve 3 and the rotating shaft, and is used for supporting the rotating shaft and enabling the rotating shaft to be suitable for rotating relative to the shaft sleeve 3, and the rotating shaft is coaxially connected with the rotor assembly.

The rotating shaft assembly comprises a rotating shaft and a rotating supporting part, the rotating supporting part is accommodated in the shaft sleeve 3 and is positioned between the shaft sleeve 3 and the rotating shaft, and the stability of the position of the rotating shaft and the stability in the rotating process are ensured; the rotating shaft is coaxially connected with the rotor assembly, so that the power output function of the motor 100 is realized.

Specifically, the rotating shaft and the rotation support portion of the first rotating shaft assembly 41 are respectively referred to as a first rotating shaft 411 and a first rotation support portion 412, and the rotating shaft and the rotation support portion of the second rotating shaft assembly 42 are respectively referred to as a second rotating shaft 421 and a second rotation support portion 422.

Optionally, the rotational support comprises at least one bearing, as shown in fig. 1 and 2.

The rotation support part comprises at least one bearing, and the bearing is used for supporting the rotating shaft, so that the use reliability of the rotating shaft can be obviously improved. Of course, the rotation support portion is not limited to the bearing, and may have another structure. Such as: a plurality of roller pins are arranged on the inner side wall 32 of the shaft sleeve 3 along the circumferential direction, and the rotating shaft is supported by the plurality of roller pins; alternatively, a plurality of coupling rings are axially disposed on the inner sidewall 32 of the sleeve 3, and the inner sidewall of the coupling rings is smooth, so that the plurality of coupling rings support the rotating shaft.

Optionally, the number of the bearings is multiple, and the multiple bearings are distributed at intervals on the same axial side of the rotor assembly along the length direction of the rotating shaft, as shown in fig. 1 and 2.

The bearings are arranged at intervals along the length direction of the rotating shaft, so that a plurality of parts of the rotating shaft can be supported, the supporting reliability of the rotating supporting part on the rotating shaft is improved, and the use reliability of the rotating shaft assembly is further improved; and a plurality of bearings are located the axial homonymy of the rotor subassembly that corresponds, are convenient for a plurality of bearings to hold in axle sleeve 3 completely, and then the end cover at a plurality of bearings and motor both ends does not have the cooperation relation, therefore only need concentrate on guarantee axle sleeve 3 the machining precision can, and need not guarantee the machining precision of end cover to be favorable to reducing manufacturing cost. Optionally, the number of the bearings is two, and the two bearings can effectively improve the supporting reliability of the rotating shaft assembly, are convenient to accommodate in the shaft sleeve 3, reduce the number of parts and save the production cost.

Further, the outer side wall 31 of the sleeve 3 is matched with the hollow channel, the inner side wall 32 of the sleeve 3 is matched with the bearing, and the sleeve 3 is matched with the hollow channel through a concave-convex structure so as to limit the axial movement of the sleeve 3 relative to the stator assembly 1.

The outer side wall 31 of the shaft sleeve 3 is matched with the hollow channel, and the inner side wall 32 of the shaft sleeve 3 is matched with the bearing, so that the position stability of the shaft sleeve 3 is ensured; and axle sleeve 3 passes through concave-convex structure cooperation with hollow channel, can prevent that axle sleeve 3 from moving along the axial for stator module 1 to further improve axle sleeve 3's stability.

Specifically, the concave-convex structure includes a flange 33 (see fig. 4) provided on the outer side wall 31 of the boss 3 and a groove provided on the wall surface of the hollow passage; wherein the flange 33 is further provided with at least one indentation 34, as shown in fig. 4.

Set up flange 33 on the lateral wall 31 of axle sleeve 3, set up the recess on the wall of hollow channel correspondingly, then make flange 33 imbed in the recess during the assembly, can realize the assembly positioning of axle sleeve 3, restriction axle sleeve 3 along stator module 1's axial displacement. Wherein, flange 33 still is equipped with at least one breach 34, and breach 34 can be with the concave-convex cooperation of the casing 8 of later stage injection moulding to prevent that axle sleeve 3 is for stator module 1 circumferential direction, and then improve axle sleeve 3's stability. Optionally, the number of the notches 34 is plural, and the plural notches 34 are spaced apart along the circumferential direction of the flange 33.

Further, a partition portion for partitioning the two rotation support portions is provided on the inner side wall 32 of the boss 3.

The separation part is arranged on the inner side wall 32 of the shaft sleeve 3, and the rotation supporting parts of the two rotating shaft assemblies can be separated at intervals by the separation part, so that the two rotating shaft assemblies are effectively prevented from interfering with each other, and the use reliability of the two rotating shaft assemblies is further improved.

Optionally, the partition is a groove 35 (shown in fig. 4) for mounting an annular retainer or baffle; the partition may also be an annular projection or an integrally formed baffle.

Example four

The difference from the third embodiment is that: on the basis of the third embodiment, further, the motor 100 further includes: an insulating frame, a mounting frame 6 and a plurality of pins 7, as shown in fig. 1 and 2.

Specifically, the insulating frame is mounted on the stator teeth; the mounting frame 6 is fixedly connected with the insulating frame; the plurality of pins 7 are inserted on the mounting frame 6, and the outgoing lines of the two groups of windings are fixedly connected to the plurality of pins 7.

The motor 100 further comprises an insulating frame, a mounting frame 6 and a plurality of contact pins 7, wherein the insulating frame is mounted on the stator teeth to ensure the safety and reliability of windings mounted on the stator teeth; the mounting frame 6 is fixedly connected with the insulating frame and provided with a plurality of contact pins 7 in an inserting mode, and outgoing lines of the two groups of windings are fixedly connected to the contact pins 7, so that the appearance heads of the two groups of windings are led out to a fixed and stable conductive carrier.

The number of the insulating frames is two or two, the two or two groups of insulating frames are respectively installed on the two groups of stator teeth and respectively marked as a first insulating frame 51 and a second insulating frame 52, and the mounting rack 6 is fixedly connected with one of the insulating frames.

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 at the radial outer side of the rotor assembly, as shown in fig. 5.

Mounting bracket 6 is coaxial in stator module 1's arc strip structure, and mounting bracket 6 and a plurality of contact pin 7 are located the radial outside of two rotor subassemblies for motor 100's structure is regular relatively, and is difficult for disturbing the inside magnetic field of motor 100, is convenient for simultaneously be connected with external line.

Further, the motor 100 further includes a housing 8, as shown in fig. 2, the housing 8 is an injection molded body, and the insulating frame, the mounting frame 6, the plurality of pins 7 and the shaft sleeve 3 are fixedly connected into a whole, as shown in fig. 5, an outer diameter of the housing 8 is greater than a 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 housing 8 include an inner end surface and an outer end surface connected to an outer edge of the inner end surface, the outer end surface is located on a radial outer side of the inner end surface and at least partially protrudes out of the inner end surface, so that both axial end surfaces of the housing 8 form a step-like structure with a high outer portion and a low inner portion, wherein both axial end surfaces of the inner end surface and the stator core 11 are flush with each other or.

The motor 100 further comprises a machine shell 8, the machine shell 8 is an injection molded body and is coated with an insulating frame, an installation frame 6 and other structures, so that the insulating frame, the installation frame 6, the plurality of contact pins 7 and the shaft sleeve 3 can be fixedly connected to form a whole, and the stability of the motor 100 is guaranteed; and the external diameter of casing 8 is greater than the biggest radial outer profile face that stator module 1, insulating frame, mounting bracket 6 and a plurality of contact pin 7 formed, has guaranteed that these parts cladding are in the radial outer surface of casing 8 to guarantee the integrality of motor 100 outward appearance, regularity and with external insulating nature. Meanwhile, two axial end faces (also called tooth wrapping faces 81) of the casing 8 are not regular planes, but are stepped structures with high outer portions and low inner portions, as shown in fig. 2 and 5, the portions protruding from the radial outer sides are marked as outer end faces, and the size is relatively small; the portion recessed inside is denoted as an inner end surface and is relatively large in size, as shown in fig. 2 and 5.

The two inner end surfaces (i.e., two axial end surfaces on the radial inner side of the housing 8) are flush with two axial end surfaces of the stator core 11 or do not exceed two axial end surfaces of the stator core 11 (i.e., two sets of tooth surfaces 1121 of the stator core 11), so that the axial air gap between the tooth surfaces and the permanent magnet can be controlled more accurately and effectively.

Further, both outer end faces of the casing 8 are respectively provided with circular bosses coaxial with the stator assembly 1, as shown in fig. 5.

Two circular bosses are arranged on two outer end faces of the casing 8 (namely, two axial end faces on the radial outer side of the casing 8), and are coaxially connected with the stator assembly 1, so that the motor 100 can be conveniently packaged by being matched with other structures. Furthermore, the circular boss may be provided with a plurality of avoidance notches, which facilitates assembly or debugging of the motor 100.

The circular boss on the first rotor assembly 21 side is referred to as a first circular boss 82, and the circular boss on the second rotor assembly 22 side is referred to as a second circular boss 83.

Further, a stepped surface 84 is provided at one axial end of the casing 8 close to the plurality of pins 7, and the plurality of pins 7 penetrate through the stepped surface 84 and protrude from the stepped surface 84 in the axial direction of the stator assembly 1, as shown in fig. 5.

The step surface 84 is arranged at one end of the machine shell 8 close to the plurality of inserting pins 7 in the axial direction, so that the plurality of inserting pins 7 penetrate through the step surface 84 and protrude out of the step surface 84 in the axial direction of the stator assembly 1, and a favorable space can be provided for connection or installation of the inserting pins 7 and other conductive parts. Wherein, the step surface 84 can be arranged on the inner side wall of one of the circular bosses, thereby further simplifying the structure of the machine shell 8.

Further, as shown in fig. 1 and 2, the motor 100 further includes: two end part encapsulation covers are respectively coaxially and fixedly installed at two axial ends of the machine shell 8 and used for encapsulating the motor 100, and are provided with shaft holes for the two rotating shaft assemblies to stretch out.

End part packaging covers are arranged at two axial ends of the shell 8, so that the integrity of the motor 100 is ensured, and the internal structure of the motor 100 is effectively protected; and the end part packaging cover is provided with a shaft hole for the corresponding rotating shaft to extend out, so that the power of the motor 100 can be output. Wherein, a step is formed between the outer wall surface of the circular boss and the outer wall surface of the casing 8, and the end encapsulation cover can be provided with a cover edge which is just matched with the step, so that the outer contour of the motor 100 is more regular.

Here, the end portion sealing cover on the first rotor assembly 21 side is referred to as a first end portion sealing cover 131, and the end portion sealing cover on the second rotor assembly 22 side is referred to as a second end portion sealing cover 132.

Further, as shown in fig. 1 and 2, the motor 100 further includes: and the electric control board 9 is arranged between the rotor assembly on any side of the motor 100 and the end part packaging cover.

The arrangement of the electric control board 9 is beneficial to realizing the automatic control of the motor 100; the electric control board 9 is arranged on any side of the motor 100 and is positioned between the rotor assembly on the side and the end part packaging cover, so that the stability of the electric control board 9 is ensured, and the circuit output of the electric control board 9 is facilitated.

Further, as shown in fig. 2, the motor 100 further includes: two axle sleeve 3 encapsulation covers, the rigid coupling is in the axial port department of axle sleeve 3 for restrict pivot subassembly axial displacement.

The shaft sleeve 3 packaging covers are arranged at two axial ports of the shaft sleeve 3, so that the axial movement of the rotating support part positioned in the shaft sleeve 3 can be prevented, the effect of limiting the axial movement of the two rotating shaft assemblies is achieved, and the use reliability of the motor 100 is further improved. The shaft sleeve 3 packaging cover can be fixedly connected with the shaft sleeve 3 through fasteners such as screws.

The bushing 3 located on the first rotor assembly 21 side is referred to as a first bushing sealing cover 101, and the bushing 3 located on the second rotor assembly 22 side is referred to as a second bushing sealing cover 102.

As shown in fig. 7, an embodiment of the second aspect of the present invention provides a fan, including: at least one motor 100 as in any of the embodiments of the first aspect, and two fans, wherein the two fans are respectively and fixedly connected with the two rotating shaft assemblies of the motor 100, and the two fans coaxially and independently rotate.

The fan provided by the embodiment of the second aspect of the present invention includes the motor 100 of any one of the embodiments of the first aspect, and therefore, the fan has the significant advantages of compact structure, strong practical functionality, convenience in installation, small axial size, low manufacturing cost, and the like.

Here, the fan connected to the first rotary shaft assembly 41 is referred to as a first fan 200, and the fan connected to the second rotary shaft assembly 42 is referred to as a second fan 300.

In the present specification, the direction of extension of the central axis of fig. 1 is simply referred to as "axial direction", the direction around the central axis is simply referred to as "circumferential direction", and the direction perpendicular to the central axis is simply referred to as "radial direction".

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

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

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 into a radial hollow whole with teeth extending on both axial sides, the radial hollow of the stator provides a favorable axial installation space for a bearing of the electric machine 100, the first winding 121 and the second winding 122 are respectively wound on stator teeth 1123 on both axial sides of the stator, and the first winding 121 and the second winding 122 can act on the electric machine 100 independently of each other.

A plurality of notches (namely clamping grooves 1111) are formed in the radial outer side of the stator yoke portion 111 and are used for matching and installing the stator tooth portions 112; a circular hole groove (i.e., a through hole 1112) is formed on the radially inner side of the stator yoke 111 for mounting the sleeve 3.

After the plurality of stator teeth 112 and the stator yoke 111 are installed in a matched manner, two groups of tooth bodies 1123 and two groups of tooth surfaces 1121 are arranged on two axial sides of the stator yoke 111, and one group of tooth surfaces 1121, which interact with the same rotor assembly, are in a plane and are perpendicular to the axis; the surface where the stator tooth part 112 and the stator yoke part 111 are installed in a matching manner is designed with a limiting step 1122, which is used for abutting against the axial end surface of the stator yoke part 111 to limit the axial relative position of the stator tooth part 112 and the stator yoke part 111.

The first rotor assembly 21 and the second rotor assembly 22 are rotatably arranged outside the two axial sides of the stator assembly 1 in a back-to-back coaxial mode, and form 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, the second rotor assembly 22 includes a second rotor disk 221 and a second permanent magnet 222, and the first rotor assembly 21 and the second rotor assembly 22 are rotatable independently of each other.

The first rotor disk 211 and the second rotor disk 221 have substantially the same structure, and one of the rotor disks is taken as an example, the radially outer side of the rotor disk is a disk-shaped structure, and the radially inner side of the rotor disk is a disk-shaped plane or conical bevel structure, so that a favorable space is provided for the installation of other parts.

The radial outer side of the rotor disc is of a disc-shaped structure and is fixedly connected with the rotating shaft in a threaded connection mode.

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

The shaft sleeve 3 is positioned in the hollow of the stator core 11, and coaxially fixed and extends out of two axial sides of the stator yoke portion 111.

The outer wall of the shaft sleeve 3 is matched with a circular groove hole on the radial inner side of the stator yoke 111, the inner wall of the shaft sleeve 3 is matched with bearings of the first rotating shaft assembly 41 and the second rotating shaft assembly 42, a flange 33 is designed on the radial outer side of the shaft sleeve 3 and used for axial limiting with the stator yoke 111, and a plurality of small gaps 34 are uniformly distributed and designed on the flange 33 in the radial direction and used for rotation stopping connection; the middle position of the inner wall of the shaft sleeve 3 is provided with a groove 35 for installing a retainer ring so as to separate the first rotating supporting part 412 and the second rotating supporting part 422 of the two rotating shaft assemblies.

The first rotating shaft assembly 41 and the second rotating shaft assembly 42 are coaxially and fixedly connected with the first rotor assembly 21 and the second rotor assembly 22 respectively, and are coaxially output from two sides of the motor 100 in the axial direction, and the first rotating shaft assembly 41 and the second rotating shaft assembly 42 can rotate independently. The first rotating shaft assembly 41 comprises a first rotating shaft 411 and two bearings, wherein the two bearings are coaxially arranged on the radial outer side of the first rotating shaft 411 and are axially arranged on the same axial side fixedly connected with the rotor assembly at intervals to form a first rotating supporting part 412; the second rotating shaft assembly 42 includes a second rotating shaft 421 and two bearings, the two bearings are coaxially disposed on the radial outer side of the second rotating shaft 421 and axially spaced on the same axial side of the second rotating shaft to form a second rotating support 422. The first rotation supporting part 412 of the first rotation shaft assembly 41 and the second rotation supporting part 422 of the second rotation shaft assembly 42 are disposed at both axial sides of the motor 100, and are all accommodated in the sleeve 3.

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 bracket 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 bracket 6. The leading-out wires of the first winding 121 and the second winding 122 are fixedly connected to the plurality of pins 7, so that the leading-out wires of the first winding 121 and the second winding 122 are led out to a stable conductive carrier.

The mounting frame 6 is an arc-shaped strip structure coaxial with the stator, and the mounting frame 6 and the plurality of pins 7 are positioned on the radial outer side of the first rotor assembly 21 and the second rotor assembly 22.

The motor 100 further comprises a plastic housing 8, and the plastic housing 8 fixedly connects the stator assembly 1, the first and second insulating frames 51 and 52, the mounting bracket 6, the plurality of pins 7 and the shaft sleeve 3 into a whole. The outer diameter of the plastic casing 8 is larger than the maximum radial outer contour surface formed by the stator assembly 1, the first insulating frame 51, the second insulating frame 52, the mounting frame 6 and the plurality of pins 7; the wrapping surfaces of the stator teeth 112 at two axial sides (namely, two axial end surfaces of the casing 8) are flush with or do not exceed two groups of tooth surfaces 1121 of the stator assembly 1; two cylindrical bosses (namely circular bosses) which are coaxial with the stator assembly 1 are arranged on the outer sides of the two axial ends of the plastic shell 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 for a certain distance to provide a space for connecting or installing the pin 7 with other conductive parts.

The motor 100 further includes a first shaft sleeve packaging cover 101 and a second shaft sleeve packaging cover 102, wherein the first shaft sleeve packaging cover 101 and the second shaft sleeve packaging cover 102 are fixedly connected to the port of the shaft sleeve 3, and limit the axial movement of the first rotating shaft assembly 41 and the second rotating shaft assembly 42.

The motor 100 further includes a first end packaging cover 131 and a second end packaging cover 132, the first end packaging cover 131 and the second end packaging cover 132 are respectively and coaxially and fixedly installed at two axial ends of the plastic housing 8, and are used for packaging the motor 100, and the end packaging covers are matched with the plastic housing 8 through rabbets.

The motor 100 may further include an electric control board 9, and the electric control board 9 is disposed between the first rotor assembly 21 and the first end encapsulation cover 131 or between the second rotor assembly 22 and the second end encapsulation cover 132 on either side of the motor 100.

A blower, comprising: the fan comprises a motor 100, a first fan 200 and a second fan 300, wherein the first fan 200 and the second fan 300 are respectively coaxially and fixedly connected with a first rotating shaft assembly 41 and a second rotating shaft assembly 42 output from two sides of the motor 100, and the first fan 200 and the second fan 300 coaxially and independently rotate.

Therefore, the motor and the fan have the remarkable advantages of compact structure, strong practical functionality, convenience in installation, small axial size, low manufacturing cost and the like.

In summary, the motor provided by the invention realizes dual-power independent output of the motor by using the cooperation of the stator assembly, the two independent rotor assemblies and the two independent rotating shaft assemblies, and can drive the two fans to rotate independently at respective rotating speeds and rotating directions without mutual interference. Compared with the scheme that two motors are respectively connected with two fans in a manner of extending back to the shaft, at least one stator assembly is omitted, the axial size of the fan is reduced, and the cost of the fan is reduced; compare in a unipolar motor and gear mechanism and cooperate the scheme that realizes both ends axle extension, realized that two fans rotate with arbitrary rotational speed and turn to wantonly, practical function is strong, is showing the diversification that has promoted fan functionality, has also saved gear mechanism, has reduced the manufacturing installation degree of difficulty of product.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (26)

1. An electric machine, comprising:

the stator assembly comprises a stator core and two groups of mutually independent windings, wherein two axial end parts of the stator core are provided with stator teeth protruding towards two axial sides of the stator core, and the two groups of windings are respectively wound on the two groups of stator teeth;

the two mutually independent rotor assemblies are arranged on two axial sides of the stator assembly in a back-to-back coaxial mode and form an axial air gap with the stator assembly, and the two rotor assemblies are configured to rotate independently; and

and the two mutually independent rotating shaft assemblies are respectively and coaxially connected with the two rotor assemblies and extend convexly in the direction away from the stator core along the axial direction of the motor.

2. The electric machine of claim 1,

the radial middle part of stator core is equipped with the cavity passageway, two a part of pivot subassembly is all arranged in the cavity passageway.

3. The electric machine of claim 2, further comprising:

the shaft sleeve is arranged in the hollow channel, and part of the two rotating shaft assemblies is inserted in the shaft sleeve.

4. The electrical machine according to any one of claims 1 to 3,

and the two rotating shaft assemblies respectively protrude towards two axial sides of the motor along the axial direction of the motor.

5. The electrical machine according to any one of claims 1 to 3,

the stator core includes stator yoke portion and follows a plurality of stator tooth portions that the circumferential direction of stator yoke portion arranged, and is a plurality of stator tooth portion with stator yoke portion equipment forms stator core, and is a plurality of stator tooth portion to stator yoke portion's axial both sides are protruding to be stretched and are formed two sets of stator tooth, two sets of the winding is established respectively around stator yoke portion axial both sides on the stator tooth.

6. The electric machine of claim 5,

a through hole matched with a shaft sleeve of the motor is formed in the radial middle of the stator yoke part, and the through hole forms a part of a hollow channel of the stator core; and/or

The radial lateral wall of stator yoke portion is equipped with the draw-in groove, the local embedding of stator tooth portion in the draw-in groove, make stator tooth portion with stator yoke portion joint cooperation.

7. The electric machine of claim 6,

any stator tooth part comprises at least one stator tooth, the stator tooth comprises a tooth body and a tooth surface which is connected with one axial end of the tooth body and is positioned on one axial side of the stator yoke part, and all the tooth surfaces of any group of stator teeth are positioned in the same plane and are perpendicular to the axis of the stator yoke part.

8. The electric machine of claim 7,

the stator tooth part comprises two stator teeth, a tooth body of the stator tooth part is provided with a limiting step, and the limiting step abuts against the stator yoke part and is used for limiting the stator tooth part to move axially relative to the stator yoke part.

9. The electrical machine according to any one of claims 1 to 3,

the rotor assembly comprises a rotor disc coaxially connected with the rotating shaft assembly and permanent magnets mounted on the rotor disc, the rotor disc comprises a disc body outer part and a disc body inner part connected with the disc body outer part from outside to inside along the radial direction of the rotor disc, the disc body outer part is of a disc-shaped structure, and the disc body inner part is of a disc-shaped structure or a conical structure.

10. The electric machine of claim 9,

the rotating shaft assembly comprises a rotating shaft, and the rotor disc is coaxially connected with the rotating shaft;

the rotor disc and the rotating shaft are of an integrated structure formed by injection molding or welding, or the rotor disc and the rotating shaft are in threaded connection or interference fit.

11. The electric machine of claim 9,

the permanent magnets are of circular or fan-shaped cake-shaped structures, the number of the permanent magnets is multiple, and the permanent magnets are uniformly distributed on the axial surface of the rotor disc facing the stator yoke in the circumferential direction to form axial magnetic flux; the N poles and the S poles of the two adjacent permanent magnets are alternately arranged or arranged in a Halbach array.

12. The electric machine of claim 3,

the rotating shaft assembly comprises a rotating shaft and a rotating supporting part, the rotating supporting part is accommodated in the shaft sleeve, is positioned between the shaft sleeve and the rotating shaft and is used for supporting the rotating shaft and enabling the rotating shaft to be suitable for rotating relative to the shaft sleeve, and the rotating shaft is coaxially connected with the rotor assembly.

13. The electric machine of claim 12,

the rotational support includes at least one bearing.

14. The electric machine of claim 13,

the number of the bearings is multiple, and the bearings are distributed on the same axial side of the rotor assembly at intervals along the length direction of the rotating shaft.

15. The electric machine of claim 14,

the outer side wall of the shaft sleeve is matched with the hollow channel, the inner side wall of the shaft sleeve is matched with the bearing, and the shaft sleeve is matched with the hollow channel through a concave-convex structure so as to limit the axial movement of the shaft sleeve relative to the stator assembly.

16. The electric machine of claim 15,

the concave-convex structure comprises a flange arranged on the outer side wall of the shaft sleeve and a groove arranged on the wall surface of the hollow channel;

wherein, the flange still is equipped with at least one breach.

17. The electric machine of claim 13,

and a partition part is arranged on the inner side wall of the shaft sleeve and used for separating the two rotation supporting parts at intervals.

18. The electric machine of any of claims 1 to 3, further comprising:

an insulating frame mounted on the stator teeth;

the mounting rack is fixedly connected to the insulating frame;

the plurality of contact pins are inserted into the mounting rack, and the outgoing lines of the two groups of windings are fixedly connected to the plurality of contact pins.

19. The electric machine of claim 18,

the mounting bracket is coaxial in stator module's arc strip structure, just the mounting bracket is a plurality of the contact pin is located the radial outside of rotor subassembly.

20. The electric machine of claim 18, further comprising:

the casing is an injection molded body, the insulating frame, the mounting frame, the plurality of contact pins and the shaft sleeve of the motor are fixedly connected into a whole, 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 contact pins, the two axial end faces of the casing respectively comprise an inner end face and an outer end face connected with the outer edge of the inner end face, the outer end face is positioned on the radial outer side of the inner end face and at least partially protrudes out of the inner end face, so that the two axial end faces of the casing form a step-shaped structure with the high outside and the low inside, wherein the two inner end faces are flush with the two axial end faces of the stator core or do not exceed the two axial end faces of the stator core.

21. The electric machine of claim 20,

and the two outer end faces of the shell are respectively provided with a circular boss which is coaxial with the stator assembly.

22. The electric machine of claim 20,

the casing is close to a plurality of the axial one end of contact pin is equipped with the step face, and is a plurality of the contact pin runs through the step face and follows stator module's axial protrusion in the step face.

23. The electric machine of claim 20, further comprising:

two tip encapsulation covers, coaxial fixed mounting respectively in the axial both ends of casing are used for the encapsulation the motor, and are equipped with and supply two the shaft hole that the pivot subassembly stretches out.

24. The electric machine of claim 23, further comprising:

and the electric control board is arranged between the rotor assembly on any side of the motor and the end part packaging cover.

25. The electric machine of claim 3, further comprising:

and the two shaft sleeve packaging covers are fixedly connected to the axial port of the shaft sleeve and used for limiting the axial movement of the rotating shaft assembly.

26. A fan, comprising:

at least one electric machine as claimed in any one of claims 1 to 25;

and the two fans are fixedly connected with the two rotating shaft assemblies of the motor respectively, and the two fans rotate coaxially and independently.

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