CN218102926U - Electric machine - Google Patents

Abstract

The utility model discloses a motor, include: the rotor comprises two rotors and two stator assemblies, wherein the stator assemblies are arranged on two sides of the rotating shaft in the axial direction, each stator assembly comprises a stator core and a stator winding, and the stator cores and the stator windings are integrally molded through injection. According to the motor provided by the embodiment of the utility model, the two rotors are arranged on the two sides of the stator component, so that the thickness of the stator component in the axial direction of the rotating shaft can be reduced, and further, the axial thickness of the motor is reduced, and the motor space is small in volume and light in weight; the stator core and the stator winding are integrally injection molded, so that the structure stability is good, the subsequent assembly is convenient, the rotor assembly is convenient, and the assembly efficiency of the motor is improved; the motor can meet the design requirement of product miniaturization, and the application range is wide.

Description

Electrical machine

Technical Field

The utility model relates to the technical field of electric motors, particularly, relate to a motor.

Background

In the related art, the motor is usually a radial magnetic field motor, the stator core of the motor stator includes a yoke portion and a stator tooth portion arranged on the inner side of the yoke portion, and the winding is wound on the stator tooth portion of the stator core, so that the motor is thicker, the occupied space is large, the motor is not beneficial to miniaturization product design, and an improved space exists.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a motor, motor axial dimensions is little, can save space, and processing assembly simple process.

According to the utility model discloses motor, include: the rotor comprises two rotors and two stator assemblies, wherein the stator assemblies are arranged on two sides of the rotating shaft in the axial direction, each stator assembly comprises a stator core and a stator winding, and the stator cores and the stator windings are integrally molded through injection.

According to the motor provided by the embodiment of the utility model, the two rotors are arranged on the two sides of the stator component, so that the thickness of the stator component in the axial direction of the rotating shaft can be reduced, and further, the axial thickness of the motor is reduced, and the motor space is small in volume and light in weight; the stator core and the stator winding are integrally injection molded, so that the structure stability is good, the subsequent assembly is convenient, the rotor assembly is convenient, and the assembly efficiency of the motor is improved; the motor can meet the design requirement of product miniaturization, and the application range is wide.

According to the utility model discloses the motor, stator module includes: the outer shell is provided with an annular mounting cavity, and the annular mounting cavity extends along the circumferential direction of the rotating shaft; the winding positioning sleeve is arranged in the annular mounting cavity and forms an annular shape; the stator windings are arranged in the annular mounting cavity and positioned on the periphery of the winding positioning sleeve, the stator windings are arranged at equal intervals along the circumferential direction of the winding positioning sleeve, and a mounting hole is formed in the middle of each stator winding; and each stator core is arranged in each mounting hole.

According to the utility model discloses the motor, stator winding includes the insulator bracket and winds and establish enameled wire on the insulator bracket, the insulator bracket has the mounting hole, the insulator bracket with one in the winding position sleeve has the spacing groove, the insulator bracket with another in the winding position sleeve has the stopper, the stopper with the cooperation of pegging graft of spacing groove.

According to the utility model discloses motor, every stator core is including being close to the inboard side of winding position sleeve and keeping away from the outside limit of winding position sleeve, wherein, inboard side is in winding position sleeve ascending length in week is less than the outside limit is in winding position sleeve ascending length in week.

In some examples, the outer side edge includes a first outer section and a second outer section symmetrically arranged radially along the winding positioning sleeve, an included angle between the first outer section and the second outer section ranges from 120 ° to 170 °; and/or the end part of the stator core is provided with a fillet.

According to the utility model discloses the motor, the rotor includes rotor back iron and permanent magnet, the rotor back iron forms the annular, the permanent magnet is located the orientation of rotor back iron one side of stator module, and follow the circumference interval arrangement of rotor back iron is a plurality of the permanent magnet.

According to the utility model discloses the motor, stator module's center has keeps away a space, every the middle part of rotor has the orientation keep away the convex boss in space, two the boss inserts keep away a space and two press from both sides between the boss and be equipped with the axle sleeve, every the boss with the axle sleeve passes through reference column and locating hole grafting cooperation.

In some examples, further comprising: the two end covers are respectively arranged at the two ends of the stator assembly in the axial direction of the rotating shaft and cover the rotor, each end cover is respectively provided with an installation cavity in the middle, the bottom wall of the installation cavity is provided with a through hole for the rotating shaft to penetrate through, and each installation cavity is internally provided with a bearing matched with the rotating shaft.

In some examples, a portion of the middle of the rotor protrudes toward the space to form the boss at one side surface of the rotor, and a limiting recess is formed at the other side surface of the rotor, and the mounting recess is adapted to be inserted into the limiting recess.

In some examples, a clamp spring is arranged on the rotating shaft and is arranged on one side, away from the bottom wall of the installation cavity, of the bearing.

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 structural view of a stator assembly according to an embodiment of the present invention;

figure 2 is a cross-sectional view of a stator assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a stator winding according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a stator core according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a stator core according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a winding positioning sleeve according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a rotor according to an embodiment of the present invention;

fig. 8 is a partially assembled schematic view of an electric machine according to an embodiment of the invention;

FIG. 9 is a cross-sectional view of the structure shown in FIG. 8;

fig. 10 is a schematic structural view of a motor according to an embodiment of the present invention;

fig. 11 is a cross-sectional view of an electric machine according to an embodiment of the present invention.

Reference numerals:

the motor (1000) is provided with a motor,

the stator assembly 100, the avoiding space 101, the rotor 200, the rotor back iron 201, the permanent magnet 202, the boss 203, the limiting concave part 204, the positioning column 205, the rotating shaft 300, the first end cover 400, the first matching groove 401, the first mounting cavity 402, the second end cover 500, the second matching groove 501, the second mounting cavity 502,

a housing 10, a first fitting boss 11, a second fitting boss 12, a lug 13,

a stator winding 20, an insulating frame 21, an enameled wire 22, a mounting hole 23, a limiting block 24,

a stator core 30, an inner side 31, an outer side 32, a first outer section 321, a second outer section 322,

a winding positioning sleeve 40, a limiting groove 41, a mounting convex part 42,

the bearing comprises a shaft sleeve 50, a positioning hole 51, a first bearing 60, a second bearing 70, a clamp spring 80 and a gasket 90.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An electric machine 1000 according to an embodiment of the invention is described below with reference to fig. 1-11.

As shown in fig. 1 to 11, a motor 1000 according to an embodiment of the present invention includes: the rotating shaft 300, the rotor 200 and the stator assembly 100, the rotating shaft 300 is disposed in the middle of the stator assembly 100, the rotor 200 includes two rotors 200, two rotors 200 are disposed on two sides of the stator assembly 100 in the axial direction of the rotating shaft 300, as shown in fig. 11, the rotating shaft 300 extends along the up-down direction, one rotor 200 is disposed on the upper side of the stator assembly 100, and the other rotor 200 is disposed on the lower side of the stator assembly 100, thereby forming a structure of a dual-rotor 200 motor 1000, the motor 1000 is thin in the axial direction, and a large amount of space can be saved, the stator assembly 100 generates a rotating magnetic field and acts on the rotor 200 to form a magnetic power rotating torque, so that the rotor 200 rotates, and the rotating shaft 300 is fixed with the rotor 200, thereby realizing the rotation of the rotating shaft 300.

Wherein, stator module 100 includes stator core 30 and stator winding 20, and the integrative injection moulding of stator core 30 and stator winding 20 carries out the integration through injection moulding process and moulds plastics, can make stator module 100 form an organic whole piece, makes stator module 100's production simple from this, is convenient for promote the mass production of motor 1000, can guarantee the stability of stator module 100's performance simultaneously.

According to the motor 1000 of the embodiment of the present invention, by disposing the two rotors 200 at two sides of the stator assembly 100, the thickness of the stator assembly 100 in the axial direction of the rotating shaft 300 can be reduced, and further, the axial thickness of the motor 1000 is reduced, so that the motor 1000 has a small space volume and a light weight; the stator core 30 and the stator winding 20 are integrally injection-molded, so that the structure stability is good, the subsequent assembly is facilitated, the rotor 200 is convenient to assemble, and the assembly efficiency of the motor 1000 is improved; the motor 1000 can meet the design requirement of product miniaturization, and has a wide application range.

In some embodiments of the present invention, as shown in fig. 10 and fig. 11, the motor 1000 is an axial magnetic field motor 1000, and the axial magnetic field motor 1000 has advantages of thin axial thickness, small space volume, light weight, high efficiency, and the like, and the power density of the axial magnetic field motor 1000 is higher, so that the material consumption of the axial magnetic field motor 1000 is less, for example, the material consumption of the axial magnetic field motor 1000 is less for copper, silicon steel, and permanent magnetic material, and the like. Compared with the prior art, the axial magnetic field motor 1000 adopts a topological structure, the axial size of the axial magnetic field motor is half of that of the traditional radial magnetic field motor 1000, and the axial magnetic field motor is convenient to adapt to the miniaturization design requirement of household appliances.

According to an embodiment of the present invention, stator assembly 100 includes: the stator comprises a housing 10, a winding positioning sleeve 40, a plurality of stator windings 20 and a plurality of stator cores 30, the housing 10 is provided with an annular installation cavity, the annular installation cavity extends along the circumferential direction of the rotating shaft 300, the winding positioning sleeve 40 is arranged in the annular installation cavity, the winding positioning sleeve 40 forms an annular structure, the stator windings 20 are arranged in the annular installation cavity, each stator winding 20 is arranged on the periphery of the winding positioning sleeve 40, the plurality of stator windings 20 are arranged at equal intervals along the circumferential direction of the winding positioning sleeve 40, a mounting hole 23 is formed in the middle of each stator winding 20, one stator core 30 is arranged in each mounting hole 23, each stator core 30 extends along the axial direction (the up-down direction shown in fig. 11) of the rotating shaft 300, and the winding positioning sleeve 40, the housing 10, the stator windings 20 and the stator cores 30 are integrally molded by injection.

It can be understood that, by providing a plurality of stator windings 20 and a plurality of stator cores 30, the stator cores 30 are mounted in the mounting holes 23 of the stator windings 20, and the stator cores 30 are of a yoke-free design, whereby the thickness of the stator assembly 100 in the axial direction thereof can be reduced, thereby reducing the volume of the stator assembly 100. And the stator winding 20 can be wound in advance, and a complex winding process is not needed after assembly, so that the winding process is simple, the operation is convenient, the assembly cost can be reduced while the assembly efficiency is improved, and the mass production is convenient.

Before moulding plastics, can directly overlap the stator winding 20 that winds in advance on stator core 30, a plurality of stator winding 20 cooperations are on winding position sleeve 40 periphery, and the rethread injection moulding process carries out the integration and moulds plastics, and it forms shell 10 to mould plastics, makes stator module 100's production simple process from this, is convenient for promote the mass production of motor 1000.

In some embodiments, the housing 10 is a Bulk Molding Compound (BMC) material, which has excellent flow property, insulation property, corrosion resistance, heat resistance and flame retardancy, for example, the BMC material can withstand a temperature of 150 ℃ to 280 ℃, has a small shrinkage rate (only three to five ten thousandths), can be injection molded, and has a low Molding temperature (120 ℃ to 160 ℃), so that the BMC material is suitable for various Molding processes, and the housing 10 made of the BMC material can be varied in shape to meet different shape requirements.

In some embodiments, the housing 10 is a resin material, which is less costly and facilitates reducing the overall cost of the stator assembly 100.

In some specific examples, the stator winding 20, the winding positioning sleeve 40 and the stator core 30 are placed in a customized tooling, wherein the placement position and the size meet the design requirements, and then the stator winding, the winding positioning sleeve and the stator core are fixed together by injection molding through a BMC material to form the housing 10 by injection molding. And when the motor is simultaneously injected, the periphery of the shell 10 is provided with lugs 13 which are uniformly distributed, the lugs 13 are provided with mounting holes of the motor 1000, and the upper end and the lower end of the shell 10 are respectively provided with a matching part which can be matched with an end cover of the motor 1000.

As shown in fig. 3, according to the utility model discloses a some embodiments, stator winding 20 includes insulator bracket 21 and enameled wire 22, stator winding 20 is with enameled wire 22 coiling on insulator bracket 21 before moulding plastics, mounting hole 23 sets up the middle part at insulator bracket 21, still have stopper 24 on the insulator bracket 21, the outer peripheral face of winding position sleeve 40 has spacing groove 41, of course, also can be that spacing groove 41 sets up on insulator bracket 21, stopper 24 sets up on winding position sleeve 40, through stopper 24 and the cooperation of pegging graft of spacing groove 41, the positioning action when realizing stator winding 20 and winding position sleeve 40 cooperation. It can be understood that the insulation frame 21 and the winding positioning sleeve 40 are fixed to the stator winding 20 through the cooperation of the limiting block 24 and the limiting groove 41 and the injection molding of the two, so that the fixing of the winding positioning sleeve 40 to the stator winding 20 is realized, the fixing reliability of the winding positioning sleeve 40 and the stator winding 20 is ensured, and the assembly of the stator assembly 100, the rotating shaft 300 and other structures can be facilitated.

The limiting block 24 here forms a trapezoidal structure, and the limiting groove 41 is a matching trapezoidal structure with a gradually reduced opening, so that the limiting block 24 and the limiting groove 41 can be in up-and-down insertion fit, and the stator winding 20 is prevented from being separated from the outer peripheral surface of the winding positioning sleeve 40.

In addition, the upper end and the lower end of the winding positioning sleeve 40 are respectively provided with an installation convex part 42, the installation convex parts 42 can facilitate the installation of the winding positioning sleeve 40 in the stator assembly 100, can play a role in positioning when the whole body is molded by injection, and can improve the reliability of the connection between the winding positioning sleeve 40 and the shell 10 after the injection molding.

In some examples, the insulation holder 21 may include two parallel plate-like structures connected by a connection arm configured as an "i" shape with the two plate-like structures, and the enamel wire 22 is adapted to be wound on the connection arm, that is, a winding slot is formed between the two plate-like structures.

As shown in fig. 4 and 5, in some examples, each stator core 30 includes an inner side 31 and an outer side 32, the inner side 31 is a side of the stator core 30 close to the winding positioning sleeve 40, and the outer side 32 is a side of the stator core 30 far from the winding positioning sleeve 40, wherein, in a circumferential direction of the winding positioning sleeve 40, a length of the inner side 31 is smaller than a length of the outer side 32, so that the structure of the stator core 30 can be more stable, and the material utilization rate of the stator core 30 can be improved. The inner side 31 may be an arc surface or a sector surface, and the outer side 32 may be an arc surface or a sector surface.

In some examples, the outer side 32 is a sector, the outer side 32 includes a first outer section 321 and a second outer section 322, and the first outer section 321 and the second outer section 322 are symmetrically arranged along the radial direction of the winding positioning sleeve 40, that is, the outer side 32 is provided with a chamfer, so that the material utilization rate can be improved, and the weight of the stator core 30 can be reduced. An included angle between the first outer section 321 and the second outer section 322 is θ, and θ satisfies the relation: theta is more than or equal to 120 degrees and less than or equal to 170 degrees. For example, θ may be 120 °, 130 °, 140 °, 150 °, 160 °, 170 °, and so on.

The utility model discloses an in some embodiments, stator core 30 does not have yoke portion, is the vertical retort form, and stator core 30's tip is equipped with the radius angle, as shown in fig. 5, rounds in stator core 30's upper end, can reduce the influence that the harmonic brought from this, and of course, stator core 30's lower extreme also can carry out the radius setting to reduce the influence that the harmonic brought. The stator core 30 has a simple shape and is easy to manufacture, and the stator core 30 may be formed by compression molding of a soft magnetic composite material (e.g., SMC material), or may be formed by stamping of silicon steel, or may be formed by processing of a coil.

In some embodiments, as shown in fig. 7, the rotor 200 includes a rotor back iron 201 and a plurality of permanent magnets 202, the rotor back iron 201 is formed with a central through hole, the rotating shaft 300 is disposed through the central through hole, and the rotating shaft 300 is fixed to the rotor back iron 201, the plurality of permanent magnets 202 are disposed at intervals along a circumferential direction of the central through hole, and the plurality of permanent magnets 202 are all located on one axial side of the rotor back iron 201 facing the stator, so that an occupied space of the motor 1000 in an axial direction of the rotating shaft 300 can be saved, and an axial thickness of the motor 1000 can be further reduced.

In some examples, the shaft 300 is transition fitted with a central through hole, and the shaft 300 and the rotor back iron 201 are fixed by welding (e.g., laser welding) at the central through hole.

In some examples, the permanent magnet 202 is a sintered permanent magnet 202, and the permanent magnet 202 is glued to the rotor back iron 201, or the permanent magnet 202 is molded on the rotor back iron 201 using magnetic powder die casting.

It is understood that the magnetic arrangement of the permanent magnet 202 can be specifically set according to actual requirements; for example, the magnetic poles of the plurality of permanent magnets 202 may be N-pole and S-pole arranged in sequence along the axial direction of the rotating shaft 300, or the plurality of permanent magnets 202 may be arranged using a Halbach array (Halbach array), which is well known to those skilled in the art and will not be described herein.

As shown in fig. 2 and 11, according to some embodiments of the present invention, the center of the stator assembly 100 has the space 101, the middle part of each rotor 200 has the boss 203, the boss 203 protrudes toward the space 101, thereby the two bosses 203 of the two rotors 200 can be respectively inserted into the space 101, the whole structure is more compact, and the shaft sleeve 50 is clamped between the two bosses 203, the boss 203 is matched with the shaft sleeve 50, thereby the installation and the matching of the rotors 200 are facilitated, the structure is compact, and the arrangement is more reasonable.

Wherein, boss 203 is last to have locating hole 51, and the upper and lower both sides of axle sleeve 50 all have reference column 205, or boss 203 is last to have reference column 205, has locating hole 51 on the axle sleeve 50, through reference column 205 and locating hole 51 grafting cooperation, realizes the location installation of rotor 200 on axle sleeve 50, avoids rotor 200 installation dislocation etc. to influence motor 1000 performance. Preferably, the boss 203 is provided with a positioning column 205, the shaft sleeve 50 is provided with a positioning hole 51, and the shaft sleeve 50 can be matched with the bosses 203 of the two rotors 200 at the same time by arranging the positioning hole 51 on the shaft sleeve 50, so that the mold opening is convenient to manufacture, and the assembly position and the assembly efficiency of the two rotors 200 are ensured. Thus, the two rotors 200 can be fixedly positioned by the bushings 50.

Further, the boss 203 of the rotor back iron 201 and the shaft sleeve 50 have through holes at corresponding positions, and the rotor 200 may be fixed to the shaft sleeve 50 by rivets through the through holes, or the rotor 200 may be fixed by welding the boss 203 of the rotor back iron 201 and the rotating shaft 300 by laser welding.

In some specific examples, as shown in fig. 7, the rotor back iron 201 is formed substantially in a disk-shaped structure, the rotor back iron 201 has a boss 203 and an edge portion, the edge portion is disposed around the boss 203, the boss 203 is disposed to protrude from the edge portion in the axial direction of the rotating shaft 300, the central through hole is formed with the boss 203, and the permanent magnet 202 is disposed at the edge portion. Therefore, the structural strength of the boss 203 can be improved, and the rotor back iron 201 and the rotating shaft 300 are ensured to be fixed reliably.

As shown in fig. 10 and 11, according to some embodiments of the present invention, the motor 1000 further includes: the first end cover 400 and the second end cover 500, the first end cover 400 and the second end cover 500 are respectively arranged at two ends of the stator assembly 100, the first end cover 400 can cover one rotor 200, the second end cover 500 can cover the other rotor 200, wherein the middle part of each end cover is provided with an installation concave cavity (namely the first installation concave cavity 402 and the second installation concave cavity 502), the bottom wall of the installation concave cavity is provided with a through hole, namely the structures of the two end covers can be the same, so that the manufacturing cost can be reduced, and the universality of parts can be improved; wherein, this through-hole can be worn to establish by pivot 300, can install a bearing (being first bearing 60 and second bearing 70) in the installation cavity of an end cover, pivot 300 is installed in first bearing 60 and second bearing 70, therefore, pivot 300 can be fixed through first bearing 60 and second bearing 70, and first bearing 60 and second bearing 70 set up along the axial interval of pivot 300, make first bearing 60 and second bearing 70 all support pivot 300, be convenient for reduce the frictional resistance of pivot 300 rotation in-process simultaneously, guarantee pivot 300 gyration precision.

As shown in fig. 11, in some specific examples, a part of the middle of the rotor 200 protrudes toward the inside of the clearance space 101, so that a boss 203 may be formed on a side surface of the rotor 200 close to the stator, a limiting recess 204 may be formed on a side surface of the rotor 200 close to the end cover, the boss 203 may be inserted into the clearance space 101, the mounting recess may be inserted into the limiting recess 204, the first bearing 60 and the second bearing 70 are correspondingly fixed in the two mounting recesses, and each bearing does not protrude from the top of the mounting recess, thereby making the overall structure more compact, reducing the axial size of the motor 1000, and meeting the design requirement of product miniaturization. In addition, the two rotors 200 are circumferentially positioned through shafts and bearings matched with the two end covers, and the whole structure is compact and stable and reliable.

As shown in fig. 11, in some examples, a clamp spring 80 is disposed on the rotating shaft 300, and the clamp spring 80 may be clamped on a side of the bottom wall of the bearing away from the installation cavity, so that the influence of the bearing escaping and the like on the structural stability may be avoided, in addition, a gasket 90 may be disposed between the bearing and the bottom wall of the installation cavity according to actual conditions, the gasket 90 may be a wave-shaped gasket 90, and a certain pre-tightening force is applied to the bearing through the gasket 90, so as to ensure the stability of the bearing.

In some examples, the first end cap 400 and the second end cap 500 are both BMC (bulk molding compound) injection molded pieces.

As shown in fig. 9 and 11, in some examples, a side of the housing 10 facing the first end cap 400 has a first fitting protrusion 11, an edge of the first end cap 400 has a first fitting groove 401, and the first fitting protrusion 11 and the first fitting groove 401 are in plug-in fit to realize a fitting connection between the first end cap 400 and the housing 10, of course, the first fitting groove 401 may also be disposed on the housing 10, and the first fitting protrusion 11 may also be disposed on the first end cap 400.

As shown in fig. 2 and 11, in some examples, a side of the housing 10 facing the second end cap 500 has a second mating protrusion 12, an edge of the second end cap 500 has a second mating groove 501, and the second mating protrusion 12 and the second mating groove 501 are in plug-in mating to realize the mating connection of the second end cap 500 with the housing 10, of course, the second mating groove 501 may also be disposed on the housing 10, and the second mating protrusion 12 may also be disposed on the second end cap 500.

As shown in fig. 1 to 11, according to a specific embodiment of the present invention, the motor 1000 structure is composed of an injection molding stator assembly 100, two rotors 200, a rotating shaft 300, a first end cap 400, a first bearing 60, a second bearing 70, and a second end cap 500.

The assembly process of the motor 1000 is: firstly, an enameled wire 22 is wound on an insulating frame 21 to form a stator winding 20, a stator core 30 is inserted into a mounting hole 23 on the insulating frame 21, a limiting block 24 on the outer side of the insulating frame 21 is in plug fit with a limiting groove 41 on the periphery of a winding positioning sleeve 40, and then the stator winding 20 and the stator core 30 which are wound in advance are injected together to form the shell 10.

Fixing the shaft sleeve 50 on the rotor 200 in an interference fit manner, fixing the rotor 200 on the rotating shaft 300 through laser welding, wherein the rotor 200 and the rotating shaft 300 can also be in interference fit and synchronously installed on the first end cover 400, wherein a bearing outer ring is in interference fit with the inner wall surface of the first installation cavity 402 on the first end cover 400, and a bearing inner ring is in interference fit with the rotating shaft 300; the stator assembly 100 formed by injection molding is installed on the rotor 200, another rotor 200 at the upper end of the stator assembly 100 is installed, the second end cover 500 is installed finally, meanwhile, a bearing is installed in the second installation cavity 502 of the second end cover 500, the outer ring of the bearing is in clearance fit with the inner wall surface of the second installation cavity 502 of the second end cover 500, the inner ring of the bearing is in interference fit with the rotating shaft 300, and the motor 1000 is assembled. The shaft 300 is thus co-located and fixed by the first bearing 60 and the second bearing 70 fixed in the first mounting cavity 402 and the second mounting cavity 502.

Other constructions and operations of the motor 1000 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein. The vertical direction, the horizontal direction, and the front-rear direction are based on the vertical direction, the horizontal direction, and the front-rear direction of the figure.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 present 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An electric machine, comprising: pivot, rotor and stator module, the rotor includes two, two the rotor is located stator module is in pivot ascending both sides of axial, wherein, stator module includes stator core and stator winding, stator core with the integrative injection moulding of stator winding.

2. The electric machine of claim 1, wherein the stator assembly comprises:

the outer shell is provided with an annular mounting cavity, and the annular mounting cavity extends along the circumferential direction of the rotating shaft;

the winding positioning sleeve is arranged in the annular mounting cavity and forms an annular shape;

the stator windings are arranged in the annular mounting cavity and positioned on the periphery of the winding positioning sleeve, the stator windings are arranged at equal intervals along the circumferential direction of the winding positioning sleeve, and a mounting hole is formed in the middle of each stator winding;

and each stator core is arranged in each mounting hole.

3. The motor of claim 2, wherein the stator winding comprises an insulation frame and an enameled wire wound on the insulation frame, the insulation frame is provided with the mounting hole, one of the insulation frame and the winding positioning sleeve is provided with a limiting groove, the other of the insulation frame and the winding positioning sleeve is provided with a limiting block, and the limiting block is in plug fit with the limiting groove.

4. The electric machine of claim 2, wherein each of the stator cores includes an inner side adjacent to the winding positioning sleeve and an outer side remote from the winding positioning sleeve, wherein a length of the inner side in a circumferential direction of the winding positioning sleeve is smaller than a length of the outer side in the circumferential direction of the winding positioning sleeve.

5. The electric machine of claim 4 wherein said outer side edges comprise first and second outer side segments symmetrically arranged radially along said winding positioning sleeve, said first and second outer side segments having an included angle therebetween in the range of 120 ° to 170 °; and/or the presence of a gas in the atmosphere,

and the end part of the stator core is provided with a fillet.

6. The electric machine of claim 1, wherein the rotor comprises a rotor back iron and permanent magnets, the rotor back iron forms a ring shape, the permanent magnets are disposed on a side of the rotor back iron facing the stator assembly, and a plurality of the permanent magnets are arranged at intervals along a circumferential direction of the rotor back iron.

7. The motor according to claim 1, wherein a space for avoiding is provided at the center of the stator assembly, a boss protruding toward the space for avoiding is provided at the middle part of each rotor, two bosses are inserted into the space for avoiding, a shaft sleeve is interposed between the two bosses, and each boss and the shaft sleeve are in insertion fit through a positioning column and a positioning hole.

8. The electric machine of claim 7, further comprising: two end covers which are respectively arranged at the two ends of the stator component in the axial direction of the rotating shaft and cover the rotor,

every the middle part of end cover is equipped with the installation cavity respectively, the diapire of installation cavity has the confession the through-hole that the pivot was worn to establish, every be equipped with in the installation cavity with pivot complex bearing.

9. The motor according to claim 8, wherein a portion of the middle portion of the rotor is protruded toward the space for space avoidance to form the boss at one side surface of the rotor and a limiting recess at the other side surface of the rotor, and the mounting recess is adapted to be inserted into the limiting recess.

10. The motor of claim 8, wherein a clamp spring is arranged on the rotating shaft, and the clamp spring is arranged on one side of the bearing, which is far away from the bottom wall of the mounting cavity.

Images