CN218102740U - Stator assembly and motor - Google Patents

Abstract

The utility model discloses a stator module and motor, stator module includes: the bearing seat is arranged in the shell and forms a ring shape; the stator core is arranged in the shell and positioned outside the bearing seat, the stator core comprises a base and a plurality of tooth parts, and each tooth part is arranged on one side of the base in the axial direction of the stator assembly; each stator winding is sleeved on the corresponding tooth part, and the shell, the bearing seat, the stator windings and the stator iron core are integrally molded through injection. According to the utility model discloses stator module, through arranging tooth portion and basal portion along the axial, through winding a plurality of stator windings and establishing on corresponding a plurality of tooth portions, stator winding is along radially placing, the magnetic flux direction forms to the axial, form the disc type structure, the overall structure is compact, reduce axial size, and is small, light in weight, stator winding's simple structure, winding simple process, the mass production low-cost stator winding of being convenient for, stator winding and stator core equipment are convenient, integrative injection moulding's structural stability is good, the assembly on the motor of being convenient for.

Description

Stator assembly and motor

Technical Field

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

Background

In the related art, the motor is usually a radial magnetic field motor, a stator core of a motor stator includes a yoke portion and a stator tooth portion arranged on the inner side of the yoke portion, and a winding is wound on the stator tooth portion of the stator core, so that the motor is thick, the occupied space is large, the motor is not beneficial to design of miniaturized products, 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 stator module, stator module axial dimension is little, can save space, and processing equipment simple process.

The utility model discloses still provide a motor.

According to the utility model discloses stator module of first aspect embodiment includes: the bearing seat is arranged in the shell and forms a ring shape, and the inner side of the bearing seat is used for mounting a bearing; the stator core is arranged in the shell and positioned outside the bearing seat, the stator core comprises a base part and a plurality of tooth parts, and each tooth part is arranged on one side of the base part in the axial direction of the stator assembly; the stator winding is in one-to-one correspondence with the tooth parts, each stator winding is sleeved on the corresponding tooth part, and the shell, the bearing seat, the stator winding and the stator iron core are integrally molded by injection.

According to the utility model discloses stator module, through arranging tooth portion and basal portion along the axial, through winding a plurality of stator windings and establishing on corresponding a plurality of tooth portions, stator winding is along radially placing, the magnetic flux direction forms to the axial, form disc type structure, the overall structure is compact, reduce axial size, and is small, light in weight, and stator winding's simple structure, winding simple process, the mass production low-cost stator winding of being convenient for, stator winding and stator core equipment are convenient, integrative injection moulding's structural stability is good, further be convenient for the assembly on the motor.

According to the utility model discloses stator module, the inboard of bearing frame has the protrusion the installation convex part of shell, the outside of bearing frame have be suitable for the plug-in to install the picture peg in the shell.

In some examples, one end of the housing has a cover covering the mounting protrusion in an axial direction of the bearing, and the other end of the housing has a clearance cavity adapted for mounting of the rotor.

According to the utility model discloses stator module in the axial of bearing, the outside of shell is equipped with a plurality of interval arrangement's lug, every the lug has the motor mounting hole.

According to the utility model discloses stator module, the tooth along slope in the direction of basal portion extends, the tooth with contained angle between the basal portion place plane is alpha, the tooth includes N, and wherein, 0.1 x (360/N) is less than or equal to alpha is less than or equal to 2 x (360/N).

In some examples, in an extending direction of the teeth, the teeth include a first end connected with the base and a second end distant from the base, wherein the second end is offset from the first end by β,1 ° ≦ β ≦ 20 ° in a circumferential direction of the base.

According to the utility model discloses stator module, tooth portion includes inboard side and outside limit, inboard side is in the ascending length of basal portion week is less than the outside limit is in the ascending length of basal portion week, wherein, the outside limit includes first outside section and the second outside section that the extending direction is different, the contained angle scope between first outside section with the second outside section is between 120 to 170.

According to the utility model discloses motor of second aspect embodiment includes: pivot, rotor and according to the utility model discloses stator module of first aspect embodiment, the rotor is located stator module is in pivot one side of axial.

According to the motor provided by the embodiment of the utility model, by adopting the stator assembly, the axial thickness can be reduced, the motor space volume is small, the weight is light, the efficiency is high, the power density of the motor is high, the copper, iron and permanent magnet materials used by the motor can be reduced, and the performance of the motor is improved; meanwhile, the stator assembly has good structural stability, the rotor is convenient to assemble, and the assembly efficiency of the motor is improved; can meet the design requirement of product miniaturization and has wide application range.

According to the utility model discloses motor still includes: the end cover is arranged on one side, away from the stator assembly, of the rotor, installation concave cavities are formed in the middle of the end cover respectively, through holes for the rotating shaft to penetrate through are formed in the bottom wall of each installation concave cavity, and bearings matched with the rotating shaft are arranged in each installation concave cavity.

According to the utility model discloses the motor, the orientation of shell one side of end cover with one of the end cover has the cooperation boss, and another has the cooperation recess, the cooperation boss with the cooperation recess cooperation of pegging graft.

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 perspective view of a stator core according to an embodiment of the present invention;

fig. 5 is a plan view of a stator core according to an embodiment of the present invention at one viewing angle;

fig. 6 is a plan view of a winding positioning sleeve according to an embodiment of the present invention at another viewing angle;

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

fig. 8 is a schematic view of a partial assembly 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 flange 2031, the limit concave 204, the positioning column 205, the rotating shaft 300, the end cover 400, the matching groove 401, the mounting concave 402,

a shell 10, a matching boss 11, a lug 13, a cover 14, a relief cavity 15,

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

stator core 30, base 301, tooth 302, first end 3021, second end 3022, inner side 31, outer side 32, first outer section 321, second outer section 322,

a bearing seat 40, a mounting boss 42, a mounting insert 43,

the bearing comprises 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 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 function 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 is to 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 stator assembly 100 according to an embodiment of the present invention includes: the stator comprises a shell 10, a bearing seat 40, a plurality of stator windings 20 and a plurality of stator cores 30, wherein the bearing seat 40 is arranged in the shell 10, the bearing seat 40 is annular, the inner side of the bearing seat 40 is used for installing a bearing, the stator cores 30 are arranged in the shell 10, the stator cores 30 are located on the outer side of the bearing seat 40, each stator core 30 comprises a base 301 and a plurality of tooth portions 302, each tooth portion 302 is arranged on one side (the upper side shown in figure 2) of the base 301, the plurality of stator windings 20 correspond to the plurality of tooth portions 302 one by one, and each stator winding 20 is sleeved on the corresponding tooth portion 302.

Wherein, the housing 10, the bearing seat 40, the stator winding 20 and the stator core 30 are integrally injection molded. That is to say, the injection molding stator assembly 100 is to splice the stator core 30 and the stator winding 20 which is independently wound in advance together, and to form the housing 10 by being fixed with the bearing seat 40 through injection molding, so that the production process of the stator is simplified, and in the injection molding process, the bearing seat 40 is synchronously injected, so that the fixation of the bearing seat 40 is realized, the production and assembly process is further simplified, the reliability of the fixation of the bearing seat 40 is ensured, and the mass production of the axial motor 1000 is promoted.

It can be understood that, by providing a plurality of stator windings 20, the stator windings 20 are sleeved on the teeth portions 302, and the axial direction of the stator assembly 100 extends vertically, so that the thickness of the stator assembly 100 in the axial direction thereof can be reduced, and the volume of the stator assembly 100 can be reduced. And the stator winding 20 can be wound in advance, and a complex winding process is not required to be carried out 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.

According to the utility model discloses stator module 100, through arranging tooth portion 302 and basal portion 301 along the axial, through with a plurality of stator winding 20 around establishing on corresponding a plurality of tooth portions 302, stator winding 20 is along radially placing, the magnetic flux direction forms to the axial, form the disc type structure, overall structure is compact, reduce axial size, and is small, light in weight, and stator winding 20's simple structure, winding simple process, the mass production low-cost stator winding 20 of being convenient for, stator winding 20 is convenient with stator core 30 equipment, integrative injection moulding's structural stability is good, the assembly on the motor 1000 of further being convenient for.

In some embodiments, the housing 10 is a Bulk Molding Compound (BMC), which has excellent flow characteristics, insulation, corrosion resistance, heat resistance and flame retardancy, for example, the BMC 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 is suitable for various Molding processes, and the housing 10 made of the BMC can have various shapes, which is beneficial for meeting 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 bearing seat 40, and the stator core 30 are placed in a customized tooling, wherein the placement position and size meet the design requirements, and then the stator winding, the bearing seat and the stator core are fixed together by injection molding through a BMC material to form the housing 10 by injection molding. When in injection molding, the outer periphery of the shell 10 is provided with evenly distributed lugs 13, 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 the end cover 400 of the motor 1000.

As shown in fig. 2, according to some embodiments of the present invention, the inner side of the bearing seat 40 has a mounting protrusion 42, the mounting protrusion 42 may protrude out of the housing 10 to expose, and when the bearing is mounted in the bearing seat 40, the bearing may be limited in both radial and axial directions of the rotating shaft 300; the outer side of the bearing seat 40 is provided with a mounting insert plate 43, and the mounting insert plate 43 can be inserted into the housing 10, so that when the stator assembly 100 is injection molded, the stability of the bearing seat 40 can be improved, and the stability of bearing fixation can be further improved.

As shown in fig. 2, in some examples, in the axial direction of the bearing (the up-down direction shown in fig. 2), the bearing seat 40 is installed at the upper end of the housing 10, the upper end of the housing 10 has a cover 14 for covering the installation protrusion 42, and the size of the cover 14 is the same as that of the installation protrusion 42, so that the cover 14 can shield the installation protrusion 42 to a certain extent, and prevent the installation protrusion 42 from being directly exposed, the other end of the housing 10 has a clearance cavity 15, and a part of the rotor 200 can be installed in the clearance cavity 15, that is, the middle of the stator assembly 100 is designed to be clearance, so as to reserve a space for installation and rotation for the rotor 200, ensure the normal use, and improve the compactness of the structure.

As shown in fig. 4-6, a stator slot is formed between two adjacent tooth portions 302, each tooth portion 302 has a first end 3021 and a second end 3022 in the extending direction of the tooth portion 302, the first end 3021 is connected with the base 301, the second end 3022 is opposite to the first end 3021, the second end 3022 is far away from the base 301, the first end 3021 is a fixed end, and the second end 3022 is a free end.

The extending direction of the tooth parts 302 is inclined relative to the direction of the plane of the base part 301, the included angle between the tooth parts 302 and the plane of the base part 301 is alpha, and the number of the tooth parts 302 is N, wherein the alpha is more than or equal to 0.1 x (360 degrees/N) and less than or equal to 2 x (360 degrees/N). That is, in the axial direction of the stator core 30, the offset angle of the second end 3022 with respect to the first end 3021 is α, the stator slot is N, and α satisfies the relationship: 0.1 × (360 °/N) ≦ α ≦ 2 × (360 °/N), for example, α may be 3.6 °, 10 °, 20 °, 30 °, 35 °, or the like, whereby torque ripple may be reduced, and vibration noise of the motor 1000 may be reduced.

In the circumferential direction of the stator core 30, the offset angle of the second end 3022 with respect to the first end 3021 is β, and β satisfies the relation: beta is more than or equal to 1 degree and less than or equal to 20 degrees. For example, β =1 °, 5 °, 10 °, 15 °, 20 °, etc. The presence of α and β makes the distance between the second end 3022 and the base 301 smaller, whereby the axial dimension of the stator core 30 can be reduced. Meanwhile, when the stator core 30 is applied to the motor 1000, counter electromotive force harmonics can be effectively reduced, thereby being advantageous to reduce torque ripple and vibration noise of the motor 1000.

As shown in fig. 4 to 6, in the axial direction of the stator core 30, the second end 3022 is shifted rightward by an angle α with respect to the first end 3021; the inner end of the second end 3022 is offset in the counterclockwise direction from the outer end by an angle β in the circumferential direction of the stator core 30.

It will be understood that in the present invention, "outer end" refers to the end away from the center of the base 301 and "inner end" refers to the end toward the center of the base 301. The "outer end" is located radially outward of the "inner end".

In one embodiment, the number of teeth 302 is 18, and the number of stator slots is 18, where 0.1 × (360 °/N) ≦ α ≦ 2 × (360 °/N), i.e., 2 ° ≦ α ≦ 40 °, that is, the second end 3022 is offset from the first end 3021 by an angle of less than 2 ° and not more than 40 ° in the axial direction of the stator core 30.

Optionally, in one particular example, α =20 °, β =10 °.

According to the utility model discloses stator core 30, through setting up the second end 3022 with tooth portion 302 to squint in axial and circumference, can reduce stator core 30's axial dimensions, when being applied to stator core 30 in motor 1000, can save axial space to be favorable to reducing motor 1000's axial dimensions. Meanwhile, the second end 3022 of the tooth portion 302 is arranged to be offset in the axial direction and the circumferential direction, so that counter electromotive force harmonics can be effectively reduced, and when the stator core 30 is applied to the motor 1000, the torque ripple and the vibration noise of the motor 1000 can be reduced.

As shown in fig. 6, 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 bearing seat 40, and the outer side 32 is a side of the stator core 30 far from the bearing seat 40, wherein, in the circumferential direction of the bearing housing 40, the length of the inner side 31 is smaller than that 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, and the outer side 32 includes a first outer section 321 and a second outer section 322, i.e., the outer side 32 is chamfered, so that the material utilization rate can be improved and the weight of the stator core 30 can be reduced. Wherein, the included angle between the first outer side section 321 and the second outer side section 322 is θ, 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.

As shown in fig. 4, in some specific examples, the plurality of teeth 302 of the stator core 30 are separated from each other, and the plurality of teeth 302 are uniformly distributed along the circumferential direction of the stator core 30, and the plurality of teeth 302 have the same offset direction and the same offset angle, thereby facilitating simplification of the structure of the stator core 30 and further facilitating simplification of the manufacturing process of the stator core 30. 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 by stamping of silicon steel, or by machining of a coil.

As shown in fig. 3, according to some embodiments of the present invention, the stator winding 20 includes an insulation frame 21 and an enamel wire 22, the enamel wire 22 is wound on the insulation frame 21 before the stator winding 20 is molded, the mounting hole 23 is disposed in the middle of the insulation frame 21, and the shape of the mounting hole 23 corresponds to the tooth portion 302. The insulation frame 21 may include two parallel plate-like structures connected by a connecting arm, the connecting arm and the two plate-like structures are configured as an inclined "i" shaped structure, and the enamel wire 22 is suitable to be wound on the connecting arm, that is, the two plate-like structures are arranged in a staggered manner, and a winding slot is formed between the two plate-like structures.

As shown in fig. 7-11, the motor 1000 according to the embodiment of the present invention includes a rotating shaft 300, a rotor 200 and a stator assembly 100, the rotating shaft 300 is disposed at the middle of the stator assembly 100, the rotor 200 is disposed at one side 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, the rotor 200 is disposed at the lower side of the stator assembly 100, thereby forming an axial motor 1000 structure, the axial thickness of the motor 1000 is thin, 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 magnetoelectric 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.

According to the motor 1000 of the embodiment of the present invention, by adopting the stator assembly 100, the axial thickness can be reduced, so that the motor 1000 has a small space volume, a light weight, a high efficiency, and a high power density of the motor 1000, and further, copper, iron and permanent magnet materials used by the motor 1000 can be reduced, and the performance of the motor 1000 is improved; meanwhile, the stator assembly 100 has good structural stability, the rotor 200 is convenient to assemble, and the assembly efficiency of the motor 1000 is improved; can meet the design requirement of product miniaturization and has wide application range.

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, permanent magnet 202 is a sintered permanent magnet 202, and permanent magnet 202 is glued to rotor back iron 201, or permanent magnet 202 is die cast on rotor back iron 201 using magnetic powder.

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.

In some specific examples, as shown in fig. 7, the rotor back iron 201 is formed in a substantially 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 boss 203 is formed in the central through hole, 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 an end cover 400, the end cover 400 is disposed at one end of the stator assembly 100, the end cover 400 can cover the rotor 200, an installation cavity 402 is disposed at the middle portion of the end cover 400, a through hole is disposed on the bottom wall of the installation cavity 402, the through hole can be penetrated by the rotating shaft 300, the second bearing 70 can be installed in the installation cavity 402, the rotating shaft 300 is installed in the second bearing 70, thereby, the rotating shaft 300 can be fixed by the first bearing 60 and the second bearing 70 inside the stator assembly 100, and the first bearing 60 and the second bearing 70 are disposed along the axial interval of the rotating shaft 300, so that the first bearing 60 and the second bearing 70 both support the rotating shaft 300, and at the same time, the friction resistance during the rotation of the rotating shaft 300 can be reduced, and the revolution precision of the rotating shaft 300 can be ensured.

As shown in fig. 7, 8 and 11, in some specific examples, a part of the middle portion 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 400, the boss 203 may be inserted into the clearance space 101, a mounting recess 402 may be inserted into the limiting recess 204, the second bearing 70 is fixed in the mounting recess 402, and none of the bearings protrudes from the top of the mounting recess 402, thereby making the overall structure more compact, reducing the axial size of the motor 1000, and meeting the design requirement of product miniaturization.

As shown in fig. 7 and 9, in some specific examples, the boss 203 has a flange 2031 at the center thereof, the flange 2031 defines a through hole, the shaft 300 can be inserted into the through hole, the flange 2031 can improve the structural strength of the boss 203 and the stability of the fit with the shaft 300, and in addition, the rotor 200 can be directly stamped to form the flange 2031 of the boss 203, so that the smoothness of the through hole and the accuracy of the aperture of the through hole can be ensured.

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 bearing away from the bottom wall of the mounting cavity 402, so that the bearing may be prevented from escaping, and the like, which may affect the structural stability, and in addition, according to actual conditions, a gasket 90 may be disposed between the bearing and the bottom wall of the mounting cavity 402, where 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 end cap 400 is a BMC (bulk molding compound) injection molded piece.

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

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-molded stator assembly 100, a rotor 200, a rotation shaft 300, an end cap 400, a first bearing 60, and a second bearing 70.

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 tooth part 302 of a stator core 30 is inserted into a mounting hole 23 on the insulating frame 21, then the wound stator winding 20, the stator core 30 and a bearing seat 40 are injected together to form a shell 10, and then a first bearing 60 is pressed into the bearing seat 40 together. The rotor 200 and the rotating shaft 300 are fixedly installed, and interference fit or laser welding can be used; then the clamp spring 80 is arranged on the rotating shaft 300; thereby respectively mounting the second bearing 70 and the first bearing 60 to the outside of the rotation shaft 300; and the snap spring 80 is installed for fixation, finally the stator assembly 100 is matched with the first bearing 60, the end cover 400 is matched with the second bearing 70, and the motor 1000 is assembled. The shaft 300 is thus co-located and fixed by the first bearing 60 fixed to the bearing housing 40 of the stator assembly 100 and the second bearing 70 fixed within the mounting pocket 402 of the end cap 400.

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 comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not directly in contact. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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. A stator assembly, comprising:

a housing;

the bearing seat is arranged in the shell and forms a ring shape, and the inner side of the bearing seat is used for mounting a bearing;

the stator core is arranged in the shell and positioned outside the bearing seat, the stator core comprises a base part and a plurality of tooth parts, and each tooth part is arranged on one side of the base part in the axial direction of the stator assembly;

a plurality of stator windings, the plurality of stator windings correspond to the plurality of tooth parts one by one, each stator winding is sleeved on the corresponding tooth part,

the shell, the bearing seat, the stator winding and the stator core are integrally formed in an injection molding mode.

2. The stator assembly of claim 1 wherein the bearing housing has a mounting tab on an inner side thereof projecting from the housing and a mounting insert plate on an outer side thereof adapted to be inserted into the housing.

3. The stator assembly of claim 2, wherein one end of the housing has a cover covering the mounting bosses in an axial direction of the bearing, and the other end of the housing has a clearance cavity adapted for rotor mounting.

4. The stator assembly of claim 1 wherein the outer housing is provided with a plurality of spaced apart lugs on an outer side of the bearing in an axial direction of the bearing, each lug having a motor mounting hole.

5. The stator assembly of claim 1, wherein the teeth extend in a direction oblique to a plane of the base, the teeth include an angle α with respect to the plane of the base, the teeth include N, and wherein 0.1 x (360 °/N) α 2 x (360 °/N).

6. The stator assembly of claim 5 wherein the teeth include a first end and a second end in a direction of extension of the teeth, the first end being connected to the base and the second end being distal from the base,

wherein the second end is offset from the first end by β,1 ° ≦ β ≦ 20 °, in a circumferential direction of the base.

7. The stator assembly of claim 1, wherein the teeth include an inner side and an outer side, the inner side having a length in the base circumferential direction that is less than a length of the outer side in the base circumferential direction,

wherein the outer side edge comprises a first outer section and a second outer section which extend in different directions, and the included angle between the first outer section and the second outer section ranges from 120 degrees to 170 degrees.

8. An electric machine, comprising: a rotating shaft, a rotor, and a stator assembly according to any of claims 1-5, the rotor being provided on one side of the stator assembly in the axial direction of the rotating shaft.

9. The electric machine of claim 8, further comprising: an end cap disposed on a side of the rotor facing away from the stator assembly,

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.

10. An electric machine according to claim 9, wherein one of the side of the housing facing the end cap and the end cap has a mating projection and the other has a mating recess, the mating projection and the mating recess being a bayonet fit.

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