CN211266602U - Electric machine - Google Patents

Abstract

The utility model discloses a motor, which comprises a stator component, a first end cover and a second end cover, wherein the stator component is provided with a first positioning part, a second positioning part, a third positioning part and a fourth positioning part; the first end cover is arranged on one side of the stator assembly along the axis direction, a fifth positioning part and a sixth positioning part are arranged on the first end cover, the fifth positioning part is embedded with the first positioning part, and the sixth positioning part is embedded with the second positioning part; the second end cover is arranged on the other side of the stator assembly along the axis direction, a seventh positioning portion and an eighth positioning portion are arranged on the second end cover, the seventh positioning portion is embedded with the third positioning portion, the eighth positioning portion is embedded with the fourth positioning portion, the first end cover and the second end cover are relatively and fixedly connected, the shape or the size of the first positioning portion is different from that of the second positioning portion, and the shape or the size of the third positioning portion is different from that of the fourth positioning portion. According to the utility model discloses motor through setting up and preventing slow-witted structure, does benefit to and improves production efficiency.

Description

Electric machine

Technical Field

The utility model relates to an electric energy conversion equipment technical field especially relates to a motor.

Background

At present, two end covers are usually covered at two ends of the motor along the axis in the motor on the market. With the development of motor technology, the types of end covers are gradually increased, and the main functions of the end covers are divided into two major aspects, namely, the structural strength and the rigidity of the whole motor are increased; on the other hand, a structure with functionality, such as an additional ventilation hole to improve the heat dissipation capability of the motor, or an inspection window of the brush device, can be added on the end cover. The weight ratio of the end cover in the structural design of the motor is very high, and any change can have a fatal influence on the overall level of the motor. Meanwhile, the problem of easy disassembly and assembly is considered in the design of the end cover, but in the existing most assembling processes, the end cover needs to be installed on a stator assembly of the motor at a preset position according to a preset angle, and the angle needs to be adjusted again if the end cover is slightly misplaced in the process. The assembly work needs a certain skill threshold, the assembly time is longer, and the assembly efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a motor, which has a fool-proof structure and is beneficial to improving the assembling efficiency.

According to the utility model discloses a motor, including stator module, first end cover and second end cover, stator module is last to be equipped with first location portion, second location portion, third location portion and fourth location portion. The first end cover is arranged on one side of the stator assembly along the axis direction, a fifth positioning part and a sixth positioning part are arranged on the first end cover, the fifth positioning part is embedded with the first positioning part, and the sixth positioning part is embedded with the second positioning part. The second end cover is arranged on the other side of the stator assembly along the axis direction, a seventh positioning portion and an eighth positioning portion are arranged on the second end cover, the seventh positioning portion is embedded with the third positioning portion, the eighth positioning portion is embedded with the fourth positioning portion, the first end cover is fixedly connected with the second end cover relatively, the first positioning portion and the second positioning portion are different in shape or size, and the third positioning portion and the fourth positioning portion are different in shape or size.

According to the utility model discloses the motor is through setting up location structure on stator module to set up on first end cover and second end cover with the location structure of stator module on location structure looks adaptation, thereby for the equipment location provides the reference, avoid makeing mistakes, do benefit to and improve production efficiency.

In addition, according to the motor of the above embodiment of the present invention, the following additional technical features may also be provided:

in some embodiments, one of the first positioning portion and the fifth positioning portion is a concave structure and the other is a convex structure; one of the second positioning part and the sixth positioning part is of a concave structure, and the other one of the second positioning part and the sixth positioning part is of a convex structure; one of the third positioning part and the seventh positioning part is of a concave structure, and the other one of the third positioning part and the seventh positioning part is of a convex structure; one of the fourth positioning portion and the eighth positioning portion is a concave structure, and the other is a convex structure.

In some embodiments, the fifth positioning portion and the sixth positioning portion are provided on a surface of the first end cover facing the second end cover, and the seventh positioning portion and the eighth positioning portion are provided on a surface of the second end cover facing the first end cover.

In some embodiments, the first positioning portion and the second positioning portion are different in size in the circumferential direction of the motor;

the third positioning portion and the fourth positioning portion are different in size in the circumferential direction of the motor.

In some embodiments, the first end cap and the second end cap each comprise a flange, a sleeve and a reinforcing rib, and the flange is of an annular structure; the shaft sleeve extends along the axial direction of the motor, and is arranged on the inner side of the flange in the projection along the axial direction of the motor; the reinforcing ribs are respectively connected with the flange and the shaft sleeve, wherein the fifth positioning portion and the sixth positioning portion are arranged on the flange of the first end cover, and the seventh positioning portion and the eighth positioning portion are arranged on the flange of the second end cover.

In some embodiments, the reinforcing rib includes a plurality of ribs arranged at intervals in a direction around the sleeve.

In some embodiments, a bifurcated structure is arranged at one end of the reinforcing rib connected with the flange; the flange is provided with bolt holes, the bolt holes are formed in the inner side of the branched structure, and the bolt holes of the first end cover and the bolt holes of the second end cover are connected in series through fixing pieces so as to fixedly connect the first end cover and the second end cover.

In some embodiments, the sleeve is spaced from the stator assembly relative to the flange in a direction of an axis of the machine, and the ribs extend in a direction perpendicular to the machine axis and then in a direction parallel to the machine axis in a direction from the sleeve to the flange.

In some embodiments, the flange of the first end cap is flat and the flange of the second end cap is tubular; a plurality of mounting holes are arranged at intervals on the periphery of the flange of one of the first end cover and the second end cover.

In some embodiments, the stator assembly has a first protrusion and a second protrusion on an outer circumferential surface thereof, the first protrusion and the second protrusion each extend in a direction parallel to the axis of the motor, two ends of the first protrusion are respectively formed as the first positioning portion and the third positioning portion, and two ends of the second protrusion are respectively formed as the second positioning portion and the fourth positioning portion.

In some embodiments, the stator assembly includes a stator core, and the first projection and the second projection are disposed on opposite sides of the stator core; the stator core is formed by overlapping a plurality of silicon steel sheets, at least one part of the periphery of the silicon steel sheets is provided with a convex part, and the convex parts of the silicon steel sheets are overlapped to form the first convex block and the second convex block.

In some embodiments, the first tab and the second tab differ in width along an axis of the stator assembly.

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

Fig. 1 is a perspective view of a motor according to an embodiment of the present invention.

Fig. 2 is a schematic view of an electric machine according to an embodiment of the invention.

Fig. 3 is a perspective view of a first end cover in a motor according to an embodiment of the present invention.

Fig. 4 is a perspective view of a first end cover in a motor according to an embodiment of the present invention.

Fig. 5 is a perspective view of a second end cover in an electric machine according to an embodiment of the present invention.

Fig. 6 is a perspective view of a second end cover in an electric machine according to an embodiment of the present invention.

Figure 7 is a cross-sectional view of a stator assembly according to an embodiment of the present invention.

Fig. 8 is a partial schematic structural view of a stator assembly according to an embodiment of the present invention.

Fig. 9 is a partial schematic structural view of a stator assembly according to an embodiment of the present invention.

Reference numerals:

the motor comprises a motor 100, a stator assembly 10, a first positioning portion 1, a second positioning portion 2, a third positioning portion 3, a fourth positioning portion 4, a first end cover 20, a fifth positioning portion 5, a sixth positioning portion 6, a second end cover 30, a seventh positioning portion 7, an eighth positioning portion 8, a flange 11, a shaft sleeve 12, a reinforcing rib 13, a bolt hole 14, a bolt 15, a mounting hole 16, a first lug 17, a second lug 18 and a notch 19.

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 and intended to be used for 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 "length", "width", "thickness", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being 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, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The motor 100 according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 9.

With reference to fig. 1, 8 and 9, a motor 100 according to an embodiment of the present invention includes a stator assembly 10, a first end cap 20 and a second end cap 30, and the stator assembly 10 is provided with a first positioning portion 1, a second positioning portion 2, a third positioning portion 3 and a fourth positioning portion 4. The first end cover 20 is disposed on one side of the stator assembly 10 along the axial direction, the first end cover 20 is provided with a fifth positioning portion 5 and a sixth positioning portion 6, the fifth positioning portion 5 is embedded with the first positioning portion 1, and the sixth positioning portion 6 is embedded with the second positioning portion 2. The second end cap 30 is disposed on the other side of the stator assembly 10 along the axial direction, the second end cap 30 is provided with a seventh positioning portion 7 and an eighth positioning portion 8, the seventh positioning portion 7 is embedded with the third positioning portion 3, the eighth positioning portion 8 is embedded with the fourth positioning portion 4, and the first end cap 20 is fixedly connected with the second end cap 30 relatively, wherein the first positioning portion 1 and the second positioning portion 2 have different shapes or sizes, and the third positioning portion 3 and the fourth positioning portion 4 have different shapes or sizes.

Specifically, the positioning structure on the first end cover 20 is respectively matched with the first positioning portion 1 and the second positioning portion 2 on the stator assembly 10, and the first positioning portion 1 and the second positioning portion 2 have obvious difference in structure and size, so that when the first end cover 20 and the stator assembly 10 are mutually buckled and assembled, the assembly can be realized only by positioning according to a preset angle in advance, and the possibility of misoperation is avoided. Similarly, the positioning structure on the second end cap 30 is respectively matched with the third positioning portion 3 and the fourth positioning portion 4 on the stator assembly 10, and the third positioning portion 3 and the fourth positioning portion 4 have obvious difference in structure and size, so that when the second end cap 30 and the stator assembly 10 are mutually buckled and assembled, the assembly can be realized only by positioning according to a preset angle in advance, and the possibility of misoperation is avoided.

Therefore, according to the utility model discloses motor 100 is through setting up location structure on stator module 10 to set up on first end cap 20 and second end cap 30 with the location structure of stator module 10 on location structure looks adaptation, thereby can provide the reference for the equipment location, avoid makeing mistakes, do benefit to and improve production efficiency.

It should be explained that the first positioning portion 1 and the second positioning portion 2 on the stator assembly 10 are used for being positioned in cooperation with the first end cover 20, and the third positioning portion 3 and the fourth positioning portion 4 on the stator assembly 10 are used for being positioned in cooperation with the second end cover 30. In order to realize the slow-witted function of preventing slow-witted, make mistakes when avoiding the assembly lock, according to the utility model discloses a motor 100 of embodiment, through the shape or the size that have different that set up first location portion 1 and second location portion 2, third location portion 3 and fourth location portion 4 have different shapes or sizes and realize, for example, first location portion 1 and second location portion 2 are the lug, and wherein, first location portion 1 has bigger size than in second location portion 2. Alternatively, in conjunction with fig. 7 to 9, the first positioning portion 1 has a smaller size than the second positioning portion 2. The dimensions here may be the length, width, thickness, etc. of the bumps themselves.

As described above, the first positioning portion 1 and the second positioning portion 2 may also have different shapes. For example, the first positioning portion 1 and the second positioning portion 2 are bumps, but the first positioning portion 1 is a diamond bump and the second positioning portion 2 is a square bump. Or the first positioning portion 1 is a convex block with an arc shape, and the second positioning portion 2 is a triangular convex block, etc. Or, the first positioning portion 1 and the second positioning portion 2 are one of the structures such as a notch, a groove, and a rib, but the two are notches, grooves, or ribs having different shapes. Or, the first positioning portion 1 and the second positioning portion 2 are respectively two types of structures such as a notch, a groove, and a blocking rib, for example, the first positioning portion 1 is a notch, and the second positioning portion 2 is a groove. For another example, the first positioning portion 1 is a bump, and the second positioning portion 2 is a groove.

In order to achieve the mutual matching pre-positioning, one of the first positioning portion 1 and the fifth positioning portion 5 is a concave structure, and the other is a convex structure. One of the second positioning portion 2 and the sixth positioning portion 6 is of a recessed structure and the other is of a raised structure. One of the third positioning portion 3 and the seventh positioning portion 7 is of a concave structure and the other is of a convex structure. One of the fourth positioning portion and the eighth positioning portion 8 is a recessed structure and the other is a raised structure.

In the present invention, the term "fitting" means that a first member of the two members is formed with a projection and fitted into a recess formed in a second member. The method can also comprise the following steps: the first component is provided with a plurality of convex parts, and the second component is provided with a plurality of concave parts corresponding to the convex parts; the first component is simultaneously provided with a convex part and a concave part, the second component is correspondingly provided with a concave part and a convex part, the convex part on the first component is embedded into the concave part of the second component, and the convex part on the second component is embedded into the concave part of the first component.

Of course, the above description of "engagement" in this application is only some embodiments of the present invention, and is not intended to limit the scope of the present invention.

Referring to fig. 1, the stator assembly 10 is provided with a first positioning portion 1 at an end facing the first end cap 20, and correspondingly, the first end cap 20 is provided with a fifth positioning portion 5 engaged therewith. Wherein the first positioning portion 1 and the fifth positioning portion 5 are fitted to each other. Specifically, referring to fig. 8, the first positioning portion 1 may be a bump. Referring to fig. 1 to 4, the fifth positioning portion 5 may be a groove, and during the assembling process, the first positioning portion 1 is embedded into the fifth positioning portion 5 to achieve the assembling pre-positioning. Of course, in other embodiments, the first positioning portion 1 may also be a groove, and the fifth positioning portion 5 may also be a bump.

In addition, with reference to fig. 7 to 9, a second positioning portion 2 is further provided at one end of the stator assembly 10 toward the first end cap 20. The first and second positioning portions 1 and 2 have different sizes, and the first and second positioning portions 1 and 2 are spaced apart in the circumferential direction of the stator assembly 10. With reference to fig. 8, the second positioning portion 2 may be a bump, and the size of the bump, such as volume, width, thickness, etc., is different from the size of the first positioning portion 1, such as width, thickness, etc. Correspondingly, with reference to fig. 4, the first end cover 20 is provided with a sixth positioning portion 6 matched with the second positioning portion 2, and the sixth positioning portion 6 may be a groove, and during the assembling process, the second positioning portion 2 is embedded into the sixth positioning portion 6 to realize the pre-positioning of the assembly. Of course, in other embodiments, the second positioning portion 2 may also be a groove, and the sixth positioning portion 6 may also be a bump.

It should be noted that, during the assembly process of the first end cover 20 and the stator assembly 10, the fifth positioning portion 5 and the sixth positioning portion 6 on the first end cover 20 need to be aligned with the first positioning portion 1 and the second positioning portion 2 on the stator assembly 10 at the same time for installation, and any common misoperation such as dislocation, overturning and the like cannot achieve assembly. In addition, the first positioning portion 1 and the second positioning portion 2, and the fifth positioning portion 5 and the sixth positioning portion 6 are distinguished clearly and easily, and the fitting connection is simple and easy to operate, so that the assembling efficiency can be improved strongly.

Similarly, referring to fig. 1, the stator assembly 10 is provided with a third positioning portion 3 at one end facing the second end cap 30, and correspondingly, the second end cap 30 is provided with a seventh positioning portion 7 engaged with the third positioning portion. Wherein the third positioner 3 and the seventh positioner 7 are fitted to each other. Specifically, in conjunction with fig. 7 to 9, the third positioning portion 3 may be a bump. Referring to fig. 6 again, the seventh positioning portion 7 may be a groove, and in the assembling process, the third positioning portion 3 is embedded into the seventh positioning portion 7 to achieve assembling pre-positioning. Of course, in other embodiments, the third positioning portion 3 may also be a groove, and the seventh positioning portion 7 may also be a bump.

In addition, with reference to fig. 7 to 9, a fourth positioning portion 4 is further provided at one end of the stator assembly 10 toward the second end cap 30. The third and fourth positioners 3, 4 have different sized dimensions and the third and fourth positioners 3, 4 are spaced apart along the circumferential direction of the stator assembly 10. With reference to fig. 8, the fourth positioning portion 4 may be a bump, and the size of the bump, such as volume, width, thickness, etc., is different from the size of the third positioning portion 3, such as volume, width, thickness, etc. Correspondingly, with reference to fig. 6, the second end cap 30 is provided with an eighth positioning portion 8 matched with the fourth positioning portion 4, and the eighth positioning portion 8 may be a groove, and in the assembling process, the fourth positioning portion 4 is embedded into the eighth positioning portion 8 to realize the assembling prepositioning. Of course, in other embodiments, the fourth positioning portion 4 may also be a groove, and the eighth positioning portion 8 may also be a bump.

It should be noted that, during the assembly process of the second end cap 30 and the stator assembly 10, the seventh locating portion 7 and the eighth locating portion 8 on the second end cap 30 need to be aligned with the third locating portion 3 and the fourth locating portion 4 on the stator assembly 10 at the same time for installation, and any common misoperation such as dislocation, overturning and the like cannot achieve assembly. In addition, the third positioning portion 3 and the fourth positioning portion 4, and the seventh positioning portion 7 and the eighth positioning portion 8 are distinguished clearly and easily, and the fitting connection is simple and easy to operate, so that the assembling efficiency can be improved strongly.

In the above embodiment, after the first end cap 20 and the second end cap 30 are assembled with the stator assembly 10 or pre-positioned, respectively, the fixing and connecting process between the first end cap 20 and the second end cap 30 becomes simpler, for example, fixing members such as screws or bolts 15 can be directly screwed into corresponding assembling positions, thereby further improving the assembling efficiency.

Alternatively, in conjunction with fig. 4, the fifth and sixth positioners 5, 6 are provided on the surface of the first end cap 20 facing the second end cap 30. Referring to fig. 6, the seventh positioning portion 7 and the eighth positioning portion are disposed on a surface of the second end cap 30 facing the first end cap 20, and the first end cap 20 and the second end cap 30 respectively cover two ends opposite to the stator assembly 10 along the axial direction, so that the positioning structures of the first end cap 20 and the second end cap 30 face each other, the overall appearance of the motor 100 can be neater, and the connection structure can be more compact.

Referring to fig. 7 to 9, the first positioning portion 1 and the second positioning portion 2 are different in size in the circumferential direction of the motor 100. The third positioning portion 3 and the fourth positioning portion 4 have different sizes in the circumferential direction of the motor 100, and since the first end cover 20 and the second end cover 30 are usually covered on the outer circumferential surface of the motor 100, the first positioning portion 1 and the second positioning portion 2 have different sizes in the circumferential direction of the motor 100, and the third positioning portion 3 and the fourth positioning portion 4 have different sizes in the circumferential direction of the motor 100, both the fool-proof structures can be made obvious, and therefore, the fool-proof structures are easy to identify and are favorable for assembly.

Referring to fig. 1 to 6, each of the first and second end caps 20 and 30 includes a flange 11, a sleeve 12, and a rib 13, and the flange 11 has an annular structure. The sleeve 12 extends in the axial direction of the motor 100, and the sleeve 12 is provided inside the flange 11 in a projection in the axial direction of the motor 100. The reinforcing rib 13 is connected to the flange 11 and the shaft sleeve 12, wherein the fifth positioning portion 5 and the sixth positioning portion 6 are both disposed on the flange 11 of the first end cap 20, and the seventh positioning portion 7 and the eighth positioning portion 8 are both disposed on the flange 11 of the second end cap 30.

In the above embodiment, the flange 11 is connected around the outer edge of the sleeve 12, and the fifth and sixth positioners 5 and 6, and the seventh and eighth positioners 7 and 8 are respectively provided on the mutually facing surfaces of the flanges 11 of the first and second end caps 20 and 30. The provision of the reinforcing ribs 13 facilitates an increase in the structural strength and rigidity of the first and second end caps 20 and 30, thereby facilitating an increase in the structural strength of the motor 100 to resist vibration and deformation generated by the high-speed rotation of the rotor assembly in the motor 100.

The form of the reinforcing ribs 13 may be variously provided, for example, the reinforcing ribs 13 include a plurality arranged at intervals in a direction around the sleeve 12. Specifically, referring to fig. 1 to 6, four reinforcing ribs 13 are provided on the surfaces of the bosses 12 of the first and second end caps 20 and 30, respectively, at intervals around the axis thereof. Of course, the number and arrangement of the reinforcing ribs 13 are not limited to the embodiments shown in fig. 1 to 6, as long as the requirements of the motor 100 on structural strength and rigidity can be ensured, and the effects of saving material, reducing weight and reducing cost can be achieved.

With continued reference to fig. 1 to 6, the end of the rib 13 that is connected to the flange 11 is provided with a bifurcated formation. The flange 11 is provided with bolt holes 14, the bolt holes 14 are arranged on the inner side of the branched structure, and the bolt holes 14 of the first end cover 20 and the bolt holes 14 of the second end cover 30 are connected in series through fixing members so as to fixedly connect the first end cover 20 and the second end cover 30. Wherein the mounting can be bolt 15, and the strengthening rib 13 forms two strengthening ribs 13 towards the one end bifurcation of flange 11 department and can further increase structural strength to the inboard of bifurcation department sets up bolt hole 14, thereby connects first end cap 20 and second end cap 30, makes connection structure compacter, the rational utilization space. Meanwhile, the connection structure of the first and second end caps 20 and 30 can be effectively protected to prevent the bolt holes 14 from being vibrated and deformed when the motor 100 rotates at a high speed, thereby preventing the bolts 15 from coming off and fastening the connection structure.

Referring to fig. 7, the iron yoke of the stator assembly 10 is formed with notches 19 at positions corresponding to the bolt holes 14 of the first and second end caps 20 and 30, and fixing members are respectively inserted through the bolt holes 14 of the first end cap 20, the bolt holes 14 of the second end cap 30, and the notches 19 of the stator assembly 10 to securely couple the first end cap 20, the second end cap 30, and the stator assembly 10, thereby further increasing the structural strength of the motor 100.

Referring to fig. 1 to 3, the sleeve 12 is spaced apart from the stator assembly 10 with respect to the flange 11 in the axial direction of the motor 100, and the reinforcing ribs 13 extend in a direction perpendicular to the axial direction of the motor 100 and then in a direction parallel to the axial direction of the motor 100 in the direction from the sleeve 12 to the flange 11.

Referring to fig. 1, the flange 11 of the first end cap 20 is flat, and the flange 11 of the second end cap 30 is tubular. A plurality of mounting holes 16 are spaced around the periphery of the flange 11 of one of the first and second end caps 20, 30. The setting of a plurality of mounting holes 16 is convenient for the final installation location of motor 100, according to the utility model discloses motor 100 can be applied to all kinds of domestic appliance such as air conditioner, new fan, electromagnetism stove, clarifier, sets up mounting hole 16 on first end cover 20 and second end cover 30, makes things convenient for motor 100 to install on all kinds of domestic appliance.

Referring to fig. 7, a first protrusion 17 and a second protrusion 18 are disposed on an outer circumferential surface of the stator assembly 10, the first protrusion 17 and the second protrusion 18 both extend in a direction parallel to an axis of the motor 100, two ends of the first protrusion 17 are respectively formed as the first positioning portion 1 and the third positioning portion 3, and two ends of the second protrusion 18 are respectively formed as the second positioning portion 2 and the fourth positioning portion 4.

Referring to fig. 8, the first protrusion 17 and the second protrusion 18 are disposed on the outer circumferential surface of the stator assembly 10, and the first protrusion 17 and the second protrusion 18 are distributed at both ends of the stator assembly 10 in the radial direction. The first projection 17 extends from one end to the other end of the stator assembly 10 in the axial direction, and the second projection 18 extends from one end to the other end of the stator assembly 10 in the axial direction. The first protrusion 17 forms a first positioning portion 1 at one end of the stator assembly 10 in the axial direction. The first projection 17 forms the second positioning portion 2 at the other end of the stator assembly 10 in the axial direction. The second projection 18 forms the second locator 2 at one axial end of the stator assembly 10, and the second projection 18 forms the fourth locator 4 at the other axial end of the stator assembly 10.

With continued reference to fig. 7-8, the stator assembly 10 includes a stator core with first and second tabs 17, 18 disposed on opposite sides of the stator core. The stator core is formed by overlapping a plurality of silicon steel sheets, at least one part of the silicon steel sheets are provided with convex parts on the periphery, and the convex parts of the plurality of silicon steel sheets are overlapped to form a first convex block 17 and a second convex block 18.

In order to achieve the fool-proof function, in the above-described embodiment, the widths of the first projection 17 and the second projection 18 along the axis of the stator assembly 10 may be set to be different.

Referring to fig. 8, the stator assembly 10 has a first projection 17, a second projection 18, a third projection and a fourth projection on the outer circumferential surface. The first projection 17 and the second projection 18 are arranged at intervals at one end of the stator assembly 10 in the axial direction, and the third projection and the fourth projection are arranged at intervals at the other end of the stator assembly 10 in the axial direction. The first bump 17 and the second bump 18 form the first positioning portion 1 and the second positioning portion 2, and the third bump and the fourth bump form the third positioning portion 3 and the fourth positioning portion 4. To achieve the fool-proof function, the first projection 17 and the second projection 18 have different widths in the axial direction of the stator assembly 10, and the third projection and the fourth projection have different widths in the axial direction of the stator assembly 10, thereby facilitating positioning.

In a word, according to the utility model discloses motor 100 owing to set up inequality location structure, can do benefit to and improve assembly efficiency, simultaneously, connection structure is simple reliable, and motor 100's intensity and rigidity are big.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (12)

1. An electric machine, comprising:

the stator assembly is provided with a first positioning part, a second positioning part, a third positioning part and a fourth positioning part;

the first end cover is arranged on one side of the stator assembly along the axis direction, a fifth positioning part and a sixth positioning part are arranged on the first end cover, the fifth positioning part is embedded with the first positioning part, and the sixth positioning part is embedded with the second positioning part;

a second end cover arranged at the other side of the stator assembly along the axial direction, wherein the second end cover is provided with a seventh positioning part and an eighth positioning part, the seventh positioning part is embedded with the third positioning part, the eighth positioning part is embedded with the fourth positioning part, and the first end cover and the second end cover are relatively and fixedly connected,

wherein the first positioning portion and the second positioning portion are different in shape or size, and the third positioning portion and the fourth positioning portion are different in shape or size.

2. The electric machine of claim 1,

one of the first positioning part and the fifth positioning part is a concave structure, and the other one is a convex structure;

one of the second positioning part and the sixth positioning part is of a concave structure, and the other one of the second positioning part and the sixth positioning part is of a convex structure;

one of the third positioning part and the seventh positioning part is of a concave structure, and the other one of the third positioning part and the seventh positioning part is of a convex structure;

one of the fourth positioning portion and the eighth positioning portion is a concave structure, and the other is a convex structure.

3. The electric machine of claim 1, wherein the fifth and sixth locating portions are provided on a surface of the first end cover facing the second end cover, and the seventh and eighth locating portions are provided on a surface of the second end cover facing the first end cover.

4. The electric machine of claim 1,

the first positioning portion and the second positioning portion are different in size in the circumferential direction of the motor;

the third positioning portion and the fourth positioning portion are different in size in the circumferential direction of the motor.

5. The electric machine of any of claims 1-4, wherein the first end cap and the second end cap each comprise:

the flange is of an annular structure;

the shaft sleeve extends along the axial direction of the motor and is arranged on the inner side of the flange in the projection along the axial direction of the motor;

the reinforcing ribs are respectively connected with the flange and the shaft sleeve,

the fifth positioning portion and the sixth positioning portion are arranged on the flange of the first end cover, and the seventh positioning portion and the eighth positioning portion are arranged on the flange of the second end cover.

6. The electric machine of claim 5 wherein said ribs comprise a plurality spaced in a direction around said sleeve.

7. The electric machine of claim 5,

a bifurcation structure is arranged at one end of the reinforcing rib connected with the flange;

the flange is provided with bolt holes, the bolt holes are formed in the inner side of the branched structure, and the bolt holes of the first end cover and the bolt holes of the second end cover are connected in series through fixing pieces so as to fixedly connect the first end cover and the second end cover.

8. The machine of claim 5 wherein said sleeve is spaced from said stator assembly relative to said flange in the direction of the axis of said machine, said ribs extending in a direction perpendicular to said machine axis and then in a direction parallel to said machine axis in a direction from said sleeve to said flange.

9. The electric machine of claim 5,

the flange of the first end cover is flat, and the flange of the second end cover is tubular;

a plurality of mounting holes are arranged at intervals on the periphery of the flange of one of the first end cover and the second end cover.

10. The electric machine according to any one of claims 1 to 4, wherein a first projection and a second projection are provided on an outer peripheral surface of the stator assembly, the first projection and the second projection each extend in a direction parallel to the axis of the electric machine, and both ends of the first projection are formed as the first positioning portion and the third positioning portion, respectively, and both ends of the second projection are formed as the second positioning portion and the fourth positioning portion, respectively.

11. The electric machine of claim 10,

the stator assembly comprises a stator core, and the first lug and the second lug are arranged on two opposite sides of the stator core;

the stator core is formed by overlapping a plurality of silicon steel sheets, at least one part of the periphery of the silicon steel sheets is provided with a convex part, and the convex parts of the silicon steel sheets are overlapped to form the first convex block and the second convex block.

12. The electric machine of claim 10, wherein the first tab and the second tab differ in width along an axis of the stator assembly.

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