ELECTRIC MOTOR AND DUST COLLECTOR

Abstract

An electric motor and a dust collector, which are related to the technical field of electric motors, are described. The electric motor includes: a front support assembly and a rear support assembly that are coupled together, and a rotor assembly and a stator assembly that are located between the front support assembly and the rear support assembly and are coupled together, wherein the stator assembly is connected to the rotor assembly in the form of a sleeve; two terminals of the rotor assembly are rotatably connected to the front support assembly and the rear support assembly, respectively, and the terminal of the rotor assembly that is connected to the rear support assembly is provided with a cooling fan blade that is located on the side of the rear support assembly away from the front support assembly;The front support assembly and the rear support assembly are fixedly connected to the corresponding terminals of the stator assembly, respectively, and both the front support assembly and the rear support assembly are provided with a through hole. This description has the effect of reducing the electric motor's losses due to wind friction and considerably improving the electric motor's efficiency.

Description

Motor and vacuum cleaner

[0001] This application claims priority from the following Chinese patent applications, the entire contents of which are incorporated herein by reference.

[0002] Serial No. Application Date Application No. Name 1 2021-09-07 202111043292.3 A motor and a vacuum cleaner 2 2021-09-07 202122148336.0 A motor and a vacuum cleaner Technical Field

[0003] The present application relates to the field of motor technology, and in particular to a motor and a vacuum cleaner. Background Art

[0004] With economic development and social progress, people are pursuing a better quality of life and are considering environmental cleanliness as a key indicator of their quality of life. Therefore, vacuum cleaners have emerged to improve environmental cleanliness. Within the vacuum cleaner architecture, the motor is a crucial component, providing the power for air flow.

[0005] A Chinese patent with publication number CN213883043U discloses a noise reduction vacuum cleaner and a vacuum cleaner motor, wherein the vacuum cleaner motor includes a motor front cover, a motor rear cover, and a motor body; the motor front cover includes a front cover body and an air inlet provided at one end of the front cover body, and the motor rear cover includes a rear cover body and an air outlet provided at one end of the rear cover body, one end of the front cover body is connected to one end of the rear cover body to form an air collecting hood, and the air inlet and the air outlet are respectively located at two opposite ends of the air collecting hood; the motor body is arranged in the air collecting hood, and a plurality of continuous gaps are provided between the peripheral side of the motor body and the inner side wall of the air collecting hood.

[0006] However, the vacuum cleaner motor improves the airflow guidance and heat dissipation capabilities by setting multiple continuous gaps between the circumference of the motor body and the inner wall of the air collecting hood. The overall structure is complex and the volume is large, which in turn affects the efficiency of the motor and needs to be improved.

[0007] Summary of the Invention

[0008] In view of this, the first object of this application is to provide a motor to achieve the purpose of significantly improving the efficiency of use. The specific solution is as follows:

[0009] A motor comprises a front bracket assembly and a rear bracket assembly that match each other, and a rotor assembly and a stator assembly that are located between the front bracket assembly and the rear bracket assembly and match each other; the stator assembly is sleeved on the rotor assembly, and the two ends of the rotor assembly are respectively rotatably connected to the front bracket assembly and the rear bracket assembly, and the end of the rotor assembly connected to the rear bracket assembly is provided with a cooling fan, and the cooling fan is located on a side of the rear bracket assembly away from the front bracket assembly; the front bracket assembly and the rear bracket assembly are respectively connected and fixed to the corresponding end of the stator assembly, and the front bracket assembly and the rear bracket assembly are both provided with through holes.

[0010] Preferably: the rear bracket assembly is provided with a guide cavity on the side facing the front bracket assembly, the rear side of the rear bracket assembly is provided with a support grid frame, the guide cavity is communicated with the through hole, the cooling air blade is located on the rear side of the support grid frame, the front side of the front bracket assembly is provided with an axis connection part, the axis of the axis connection part coincides with the axis of the cooling air blade, and an opening for exposing the stator assembly is formed between the front bracket assembly and the rear bracket assembly.

[0011] Preferably: both ends of the front side of the rear bracket assembly are symmetrically provided with rear fixing parts, and both ends of the rear side of the front bracket assembly are symmetrically provided with front fixing parts, the two front fixing parts are respectively matched with the corresponding rear fixing parts, and are threadedly connected with connecting bolts, and the through-holes include multiple front side wall holes and multiple front bottom holes, the multiple front side wall holes are symmetrically distributed on the two side walls of the front bracket assembly, and the multiple front bottom holes are arrayed on the front side wall of the front bracket assembly.

[0012] Preferably: the front bracket assembly is in the shape of a cube, the front side wall hole is located on the left and right or upper and lower side walls that are symmetrical on two sides of the front bracket assembly, the front fixing part is located on the upper and lower or left and right side walls that are symmetrical on the other two sides of the front bracket assembly, and two symmetrically distributed carbon brush insertion slots are provided on the front bracket assembly, and the two carbon brush insertion slots are respectively matched with the corresponding front fixing part positions.

[0013] Preferably: the front side of the front bracket assembly is provided with two carbon brush ventilation bottom holes which match the corresponding carbon brush plug-in slots respectively; the four corners of the front bracket assembly are chamfered, and inclined side wall holes are provided on the chamfers; four carbon brush side holes are provided on the outer peripheral side wall of the front bracket assembly, and every two carbon brush side holes are symmetrically distributed at the two ends of the corresponding carbon brush plug-in slot; and a fan ring body is provided on the rear side of the rear bracket assembly, and the cooling fan blades are located in the fan ring body; an inclined guide wall is provided on the side of the guide cavity close to the fan ring body.

[0014] Preferably: the rotor assembly includes a rotor shaft, the two ends of the rotor shaft are respectively rotatably connected to the shaft connection part and the support grid frame, the rotor shaft is provided with a rotor core, and the rotor core is provided with a rotor winding; the stator assembly includes a stator core, the stator core is provided with a connecting slot matching the rotor core, two stator slots symmetrically distributed relative to the connecting slot, and two annular stator windings symmetrically distributed relative to the connecting slot, and the two stator windings respectively and simultaneously pass through the corresponding ends of the two stator slots.

[0015] Preferably: the stator slot is W-shaped, and an opening is formed on the side where the two stator slots face each other, and the opening of the stator slot is connected to the corresponding side of the connecting slot; a stator slot paper is inserted into the stator slot, and the stator slot paper includes a W-shaped central abutment portion that is in contact with the stator iron core and two end abutment portions at both ends symmetrical to the central abutment portion, the opening of the stator slot is formed between the corresponding two end abutment portions, and a winding slot for the stator winding to pass through is formed between the end abutment portion and the central abutment portion; stator end plates are provided at both ends of the stator iron core in the axial direction, and the part of the stator winding that passes through the stator iron core is abutted and fixed to the stator end plates, and the stator end plates are square-shaped, and terminal sockets are provided at the four corners of the stator end plates, and piercing terminals are provided in the terminal sockets.

[0016] Preferably: the rotor core is provided with a plurality of slot paper slots with equal curvature distribution, the slot paper slots are provided with V-shaped rotor slot paper, and the rotor winding is wound in two adjacent rotor slot papers; the rotor core is provided with a plurality of slot covers with equal curvature distribution along the radial outer side, the two sides of the slot cover are matched with the corresponding slot paper slots respectively, and a gap with a width smaller than the width of the slot paper slot away from the rotating shaft is formed between two adjacent slot covers; a rotor slot wedge is provided between two adjacent slot covers, the width of the rotor slot wedge is greater than the width of the gap, and the rotor slot wedge is located on the side of the slot cover facing the rotor rotating shaft.

[0017] Preferably: the rotor shaft includes two end plate connections and a steering connection respectively located at both ends of the rotor core along the axis; the steering connection is connected to the end of one of the end plate connections away from the rotor core, and is provided with a commutator; the end plate connection is provided with a rotor end plate fixed in contact with the rotor core; and the other end plate connection is provided with a bearing at one end away from the rotor core, and the bearing is used to connect to the support grid frame.

[0018] A second object of the present application is to provide a vacuum cleaner comprising the motor as described above.

[0019] From the above solutions, it can be seen that the present application provides a motor and a vacuum cleaner, which have the following beneficial effects:

[0020] 1. The stator assembly and the rotor assembly are effectively matched by cooperating the connecting slots with the rotor core. When the connecting slots are installed in conjunction with the stator winding, the coordination efficiency of the stator assembly and the rotor assembly is significantly improved.

[0021] 2. By installing the cooling fan blades on the side of the support grid away from the front bracket assembly, the air outlet efficiency of the cooling fan blades is improved. In combination with the wrapping effect of the fan ring, the load on the cooling fan blades is reduced, and the wind wear of the motor is reduced, thereby improving the ventilation and heat dissipation effect of the motor while improving the efficiency of the motor;

[0022] 3. By arranging carbon brush side holes, inclined side wall holes and carbon brush ventilation bottom holes around the carbon brush insertion slot, when the cooling fan blade is working, the air flow is driven through the carbon brush assembly of the motor to remove the heat generated between the carbon brush assembly and the rotor. In combination with the inclined guide wall to guide the gas flow, the front bottom hole and the positive side wall hole are used to allow the air flow to enter the guide cavity, so that the air flow flows in an orderly manner from the front bracket assembly to the rear bracket assembly, and then is discharged through the support grid frame after absorbing the heat in the motor, thereby achieving the purpose of improving the heat dissipation effect.

[0023] 4. The rotor winding is installed and fixed through the structural structure of the rotor slot paper, rotor slot wedges and rotor core, thereby significantly improving the coordination efficiency of the stator assembly and the rotor assembly in coordination with the stator core;

[0024] 5. The rotor core is further mounted and fixed by the rotor end plate, so that the rotor assembly has a high structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] FIG1 is a schematic structural diagram of a motor disclosed in this application;

[0027] FIG2 is a schematic diagram of the exploded structure of the motor disclosed in this application;

[0028] FIG3 is a schematic diagram of the exploded structure of the rotor assembly and the stator assembly disclosed in this application.

[0029] Description of reference numerals:

[0030] 1. Rotor assembly; 11. Rotor shaft; 111. Steering connection; 112. End plate connection; 113. Rotor core; 1131. Slot paper slot; 1132. Slot cover; 1133. Gap; 12. Rotor slot paper; 13. Rotor slot wedge; 14. Rotor end plate; 15. Rotor winding; 16. Bearing; 17. Commutator;

[0031] 2. Stator assembly; 21. Stator core; 211. Stator slot; 212. Connecting slot; 22. Stator end plate; 221. Terminal socket; 23. Stator slot paper; 231. Center abutment; 232. End abutment; 233. Winding slot; 24. Stator winding; 25. Piercing terminal;

[0032] 3. Front bracket assembly; 31. Shaft connection; 32. Front fixing portion; 33. Carbon brush insertion slot; 331. Carbon brush side hole; 332. Inclined side wall hole; 333. Carbon brush ventilation bottom hole; 34. Positive side wall hole; 35. Front bottom hole; 36. Flat washer; 37. Nut; 38. Support sleeve; 39. Insertion hole;

[0033] 4. Rear bracket assembly; 41. Inner guide cavity; 411. Inclined guide wall; 42. Fan blade ring; 43. Rear fixing part; 44. Support grid frame; 5. Cooling fan blade; 6. Carbon brush assembly; 7. Connecting bolts. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] As shown in Figure 1, a motor includes a front bracket assembly 3 and a rear bracket assembly 4 that match each other, and a rotor assembly 1 and a stator assembly 2 that match each other and are located between the front bracket assembly 3 and the rear bracket assembly 4. The front bracket assembly 3 and the rear bracket assembly 4 are respectively fixedly connected to corresponding ends of the stator assembly 2, and the two ends of the rotor assembly 1 are respectively rotatably connected to the front bracket assembly 3 and the rear bracket assembly 4. An opening is formed between the front bracket assembly 3 and the rear bracket assembly 4 to expose the stator assembly 2, so that the portion of the stator assembly 2 located in the opening has the effect of improving heat dissipation performance while avoiding obstruction by the front bracket assembly 3 and the rear bracket assembly 4.

[0036] As shown in Figures 2 and 3, the stator assembly 2 is sleeved onto the rotor assembly 1, and cooling blades 5 are provided at one end of the rotor assembly 1 where it connects to the rear support assembly 4. The cooling blades 5 are connected to the rotor assembly 1 so that they rotate when driven by the rotor assembly 1, thereby effectively dissipating heat from the motor. The cooling blades 5 are located on the side of the rear support assembly 4 away from the front support assembly 3, and both the front and rear support assemblies 3 and 4 are provided with perforations. The perforations on the front support assembly 3 communicate with the inner sides of the stator assembly 2 and rotor assembly 1. Correspondingly, the perforations on the rear bracket assembly 4 are connected to the inner sides of the stator assembly 2 and the rotor assembly 1, so that when the rotor assembly 1 drives the cooling fan blades 5 to rotate, the airflow passes through the perforations on the front bracket assembly 3 and enters between the front bracket assembly 3 and the stator assembly 2, and then passes through the inner sides of the stator assembly 2 and the rotor assembly 1, between the stator assembly 2 and the rear bracket assembly 4, and the perforations on the rear bracket assembly 4 in turn, thereby forming a stable gas flow path under the drive of the cooling fan blades 5, thereby significantly improving the structural rationality and heat dissipation performance of the motor.

[0037] It's worth noting that a flow guide cavity 41 is provided on the side of the rear support assembly 4 facing the front support assembly 3. A perforated support grid 44 is provided on the rear side of the rear support assembly 4. The flow guide cavity 41 and the perforations are connected. Meanwhile, the cooling blades 5 are located on the rear side of the support grid 44, and an axle connection portion 31 is provided on the front side of the front support assembly 3. The axis of the axle connection portion 31 coincides with the axis of the cooling blades 5.

[0038] At the same time, rear fixing portions 43 are provided at both symmetrical ends of the front side of the rear bracket assembly 4. Correspondingly, front fixing portions 32 are provided at both symmetrical ends of the rear side of the front bracket assembly 3. The two front fixing portions 32 mate with the corresponding rear fixing portions 43 and are threadedly connected to connecting bolts 7. The perforations include multiple front sidewall holes 34 and multiple front bottom holes 35 located on the front bracket assembly 3. The multiple front sidewall holes 34 are symmetrically distributed on both sidewalls of the front bracket assembly 3, while the multiple front bottom holes 35 are arranged in an array on the front sidewall of the front bracket assembly 3.

[0039] As shown in FIG2 , the front bracket assembly 3 is in the shape of a cube. The front sidewall holes 34 are located on two symmetrical left and right or upper and lower sidewalls of the front bracket assembly 3, and the front fixing portion 32 is located on the other two symmetrical upper and lower or left and right sidewalls of the front bracket assembly 3. Two symmetrically distributed carbon brush insertion slots 33 are provided on the front bracket assembly 3, and the two carbon brush insertion slots 33 match the positions of the corresponding front fixing portions 32, so that when the front bracket assembly 3 and the rear bracket assembly 4 are mated and installed, the connecting bolts 7 pass through the carbon brush insertion slots 33 and enter the inner side of the front bracket assembly 3. After the front fixing portion 32 and the rear fixing portion 43 are threadedly connected, the front bracket assembly 3 and the rear bracket assembly 4 are installed and fixed.

[0040] It should be mentioned that two carbon brush ventilation bottom holes 333 are provided on the front side of the front bracket assembly 3, which are matched with the corresponding carbon brush plug-in slots 33 respectively. The four corners of the front bracket assembly 3 are chamfered, and inclined side wall holes 332 are provided on the chamfers. Four carbon brush side holes 331 are provided on the outer peripheral side wall of the front bracket assembly 3, and every two carbon brush side holes 331 are symmetrically distributed at both ends of the corresponding carbon brush plug-in slots 33. At the same time, a fan ring body 42 is provided on the rear side of the rear bracket assembly 4. The cooling fan blade 5 is located in the fan blade ring body 42, and an inclined guide wall 411 is provided on the side of the guide cavity 41 close to the fan blade ring body 42 to guide the gas to flow to the perforations on the support grid frame 44 through the inclined guide wall 411.

[0041] As shown in Figures 2 and 3, the rotor assembly 1 includes a rotor shaft 11. The ends of the rotor shaft 11 are rotatably connected to the shaft connection portion 31 and the support grid 44, respectively. One end of the rotor shaft 11, which passes through the shaft connection portion 31, is fitted with a support sleeve 38, a flat washer 36, and a nut 37, in sequence. This completes the installation of the rotor assembly 1 and creates a stable rotational connection between the rotor assembly 1 and the front bracket assembly 3.

[0042] The rotor shaft 11 is provided with a rotor core 113, and a rotor winding 15 is provided on the rotor core 113. Correspondingly, the stator assembly 2 includes a stator core 21. The stator core 21 is provided with a connecting slot 212 matching the rotor core 113, two stator slots 211 symmetrically distributed relative to the connecting slot 212, and two annular stator windings 24 symmetrically distributed relative to the connecting slot 212. The two stator windings 24 respectively pass through the corresponding ends of the two stator slots 211 at the same time. Among them, the stator slot 211 is W-shaped, and an opening is formed on the side facing each other of the two stator slots 211. The opening of the stator slot 211 is connected to the corresponding side of the connecting slot 212. At the same time, a stator slot paper 23 is inserted into the stator slot 211. The stator slot 23 includes a W-shaped center abutment portion 231 that abuts against the stator core 21, and two end abutment portions 232 located symmetrically at either end of the center abutment portion 231. The opening of the stator slot 211 is formed between the two corresponding end abutment portions 232. A winding slot 233 for the stator winding 24 to pass through is formed between the end abutment portions 232 and the center abutment portion 231. Stator end plates 22 are provided at both axial ends of the stator core 21. The portion of the stator winding 24 that extends from the stator core 21 abuts and secures against the stator end plates 22. The stator end plates 22 are square in shape, and terminal sockets 221 are provided at each of the four corners of the stator end plates 22. Piercing terminals 25 are provided within the terminal sockets 221 to secure the piercing terminals 25 through the terminal sockets 221 and to establish electrical connections through the piercing terminals 25. Correspondingly, four plug holes 39 matching the corresponding terminal sockets 221 are provided on the front bracket assembly 3 to achieve the purpose of stably connecting the front bracket assembly 3 and the stator assembly 2.

[0043] As shown in Figure 3, the rotor core 113 is provided with multiple equally spaced slots 1131. Each slot 1131 is provided with a V-shaped rotor slot 12, and the rotor winding 15 is wound between two adjacent rotor slots 12. It should be noted that multiple equally spaced slot covers 1132 are provided radially outwardly of the rotor core 113. The two sides of the slot covers 1132 match the corresponding slots 1131, and a gap 1133 is formed between two adjacent slot covers 1132, with a width smaller than the width of the slot 1131 at the end facing away from the rotor shaft. A rotor wedge 13 is provided between two adjacent slot covers 1132. The width of the rotor wedge 13 is greater than the width of the gap 1133, and the rotor wedge 13 is located on the side of the slot cover 1132 facing the rotor shaft 11.

[0044] It should be noted that the rotor shaft 11 includes two end plate connections 112, located at opposite ends of the rotor core 113 along the axis, and a diverter connection 111. The diverter connection 111 is connected to the end of one of the end plate connections 112 away from the rotor core 113 and is provided with a commutator 17. The end plate connection 112 is provided with a rotor end plate 14 that abuts and secures against the rotor core 113, and the other end plate connection 112 is provided with a bearing 16 at the end away from the rotor core 113. The bearing 16 is used to connect to the support grid 44 and is sleeved onto the rotor shaft 11.

[0045] A vacuum cleaner comprises the motor described above.

[0046] In summary, the motor of the present application achieves effective coordination between the stator assembly 2 and the rotor assembly 1 by cooperating the connecting slots 212 with the rotor core 113. Furthermore, when the connecting slots 212 are cooperating with the stator winding 24, the coordination efficiency of the stator assembly 2 and the rotor assembly 1 is significantly improved. At the same time, by installing the cooling blades 5 on the side of the support grid 44 away from the front bracket assembly 3, the air outlet efficiency of the cooling blades 5 is improved. Furthermore, by combining the wrapping effect of the blade ring 42, the load on the cooling blades 5 is reduced, reducing the wind wear of the motor. This improves the ventilation and heat dissipation of the motor while also improving the efficiency of the motor. In order to further improve the heat dissipation performance and effect, carbon brush side holes 331, inclined side wall holes 332 and carbon brush ventilation bottom holes 333 are arranged around the carbon brush insertion slot 33, so that when the cooling fan blade 5 is working, the air flow is driven to pass through the carbon brush assembly 6 of the motor, and the heat generated between the carbon brush assembly 6 and the rotor is taken away. The inclined guide wall 411 is combined to guide the gas flow, and the front bottom hole 35 and the positive side wall hole 34 are used to allow the air flow to enter the guide cavity 41, so that the air flow flows in an orderly manner from the front bracket assembly 3 to the rear bracket assembly 4, and is discharged through the support grid frame 44 after absorbing the heat in the motor.

[0047] The rotor assembly 1 of the motor, through the structural structure of the rotor slot paper 12, rotor slot wedges 13, and rotor core 113, completes the installation and fixation of the rotor winding 15, thereby significantly improving the working efficiency of the stator assembly 2 and the rotor assembly 1 in cooperation with the stator core 21. The rotor core 113 is further installed and fixed by the rotor end plate 14, so that the rotor assembly 1 has a high structural stability.

[0048] References to "first," "second," "third," "fourth," and the like (if any) herein are intended to distinguish similar objects and are not necessarily intended to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, or apparatus.

[0049] It should be noted that the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A motor, characterized in that: The invention comprises a front support assembly (3) and a rear support assembly (4) that match each other, and a rotor assembly (1) and a stator assembly (2) that are located between the front support assembly (3) and the rear support assembly (4) and match each other; the stator assembly (2) is sleeved on the rotor assembly (1), and the two ends of the rotor assembly (1) are rotatably connected to the front support assembly (3) and the rear support assembly (4), and one end of the rotor assembly (1) connected to the rear support assembly (4) is provided with a cooling fan (5), and the cooling fan (5) is located on a side of the rear support assembly (4) away from the front support assembly (3); the front support assembly (3) and the rear support assembly (4) are respectively connected and fixed to the corresponding end of the stator assembly (2), and the front support assembly (3) and the rear support assembly (4) are both provided with through holes.

2. A motor according to claim 1, characterized in that: The rear support assembly (4) is provided with a guide cavity (41) on the side facing the front support assembly (3), and a support grid frame (44) is provided on the rear side of the rear support assembly (4). The guide cavity (41) is connected to the through hole, and the cooling air blade (5) is located on the rear side of the support grid frame (44). The front side of the front support assembly (3) is provided with an axial connection part (31), and the axis of the axial connection part (31) coincides with the axis of the cooling air blade (5), and an opening for exposing the stator assembly (2) is formed between the front support assembly (3) and the rear support assembly (4).

3. The motor according to claim 2, characterized in that: The rear bracket assembly (4) is provided with rear fixing parts (43) at both ends of the front side that are symmetrical to each other, and the front bracket assembly (3) is provided with front fixing parts (32) at both ends of the rear side that are symmetrical to each other. The two front fixing parts (32) are matched with the corresponding rear fixing parts (43) respectively and are threadedly connected with connecting bolts (7). The through holes include a plurality of positive side wall holes (34) and a plurality of front side bottom holes (35). The plurality of positive side wall holes (34) are symmetrically distributed on the two side walls of the front bracket assembly (3), and the plurality of front side bottom holes (35) are distributed in an array on the front side wall of the front bracket assembly (3).

4. The motor according to claim 3, characterized in that: The front bracket assembly (3) is in a cube shape, the front side wall holes (34) are located on the left and right side walls or the upper and lower side walls on two sides of the front bracket assembly (3) that are symmetrical to each other, the front fixing portion (32) is located on the upper and lower side walls or the left and right side walls on the other two sides of the front bracket assembly (3) that are symmetrical to each other, and the front bracket assembly (3) is provided with two symmetrically distributed carbon brush insertion slots (33), and the two carbon brush insertion slots (33) are respectively matched with the positions of the corresponding front fixing portions (32).

5. The motor according to claim 4, characterized in that: The front side of the front bracket assembly (3) is provided with two carbon brush ventilation bottom holes (333) respectively matching the corresponding carbon brush plug-in slots (33); the four corners of the front bracket assembly (3) are chamfered, and inclined side wall holes (332) are provided on the chamfers; four carbon brush side holes (331) are provided on the outer peripheral side wall of the front bracket assembly (3), and each two carbon brush side holes (331) are symmetrically distributed at the two ends of the corresponding carbon brush plug-in slots (33); and the rear side of the rear bracket assembly (4) is provided with a fan ring body (42), and the cooling fan blades (5) are located in the fan ring body (42); the guide cavity (41) is provided with an inclined guide wall (411) on the side close to the fan ring body (42).

6. The motor according to claim 2, characterized in that: The rotor assembly (1) comprises a rotor shaft (11), the two ends of the rotor shaft (11) being rotatably connected to a shaft connection portion (31) and a support grid frame (44), the rotor shaft (11) being provided with a rotor core (113), and the rotor core (113) being provided with a rotor winding (15); the stator assembly (2) comprises a stator core (21), the stator core (21) being provided with a connecting slot (212) matching the rotor core (113), two stator slots (211) symmetrically distributed relative to the connecting slot (212), and two annular stator windings (24) symmetrically distributed relative to the connecting slot (212), the two stator windings (24) respectively and simultaneously passing through corresponding ends of the two stator slots (211).

7. The motor according to claim 6, characterized in that: The stator slot (211) is W-shaped, and an opening is formed on one side of the two stator slots (211) facing each other, and the opening of the stator slot (211) is communicated with the corresponding side of the connecting slot (212); a stator slot paper (23) is inserted into the stator slot (211), and the stator slot paper (23) includes a W-shaped central abutment portion (231) that is in contact with the stator core (21) and two end abutment portions (232) located at both ends symmetrically with the central abutment portion (231), and the opening of the stator slot (211) is formed on the corresponding two end abutment portions. A winding slot (233) for the stator winding (24) to pass through is formed between the end abutting portion (232) and the center abutting portion (231); stator end plates (22) are provided at both ends of the stator core (21) along the axial direction; the portion of the stator winding (24) passing through the stator core (21) is abutted and fixed to the stator end plate (22); the stator end plate (22) is square in shape, and terminal sockets (221) are provided at the four corners of the stator end plate (22); and piercing terminals (25) are provided in the terminal sockets (221).

8. The motor according to claim 6, characterized in that: The rotor core (113) is provided with a plurality of slot paper slots (1131) with equal arc distribution, the slot paper slots (1131) are provided with V-shaped rotor slot papers (12), and the rotor winding (15) is wound in two adjacent rotor slot papers (12); the rotor core (113) is provided with a plurality of slot covers (1132) with equal arc distribution along the radial outer side, the two sides of the slot covers (1132) are matched with the corresponding slot paper slots (1131), and a gap (1133) with a width smaller than the width of the slot paper slot (1131) away from the rotating shaft is formed between two adjacent slot covers (1132); a rotor slot wedge (13) is provided between two adjacent slot covers (1132), the width of the rotor slot wedge (13) is larger than the width of the gap (1133), and the rotor slot wedge (13) is located on the side of the slot cover (1132) facing the rotor rotating shaft (11).

9. The motor according to claim 8, characterized in that: The rotor shaft (11) comprises two end plate connection parts (112) and a steering connection part (111) respectively located at two ends of the rotor core (113) along the axis; the steering connection part (111) is connected to one end of the end plate connection part (112) away from the rotor core (113) and is provided with a commutator (17); the end plate connection part (112) is provided with a rotor end plate (14) abutting and fixed with the rotor core (113); and the other end plate connection part (112) is provided with a bearing (16) at one end away from the rotor core (113), and the bearing (16) is used to connect with the support grid frame (44).

10. A vacuum cleaner, characterized in that: The motor comprises the motor according to any one of claims 1 to 9.

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