Electric machine and air-drying device

Abstract

The application relates to a motor and a drying device. The motor comprises a shell, a support, a driving assembly, a support frame and an impeller. The shell is provided with a containing cavity which penetrates the shell along the axial direction of the motor. The support comprises a support base and a plurality of support parts. The support base is arranged at intervals with the shell. The support parts are arranged at intervals in sequence and connected to the support base to form an air inlet of the motor. The driving assembly comprises a stator assembly and a rotor. The stator assembly is fixedly arranged on the support. The rotor is arranged in the stator assembly. The support frame is arranged on the side of the driving assembly away from the support. The support frame comprises a center base and a plurality of support parts. The center base is arranged at intervals with the shell. The support parts are arranged at intervals in sequence and connected to the center base. The impeller is arranged on the side of the support frame away from the driving assembly and connected to the rotor. The impeller is driven by the rotor to discharge air outward from the support to the direction of the impeller to form an air outlet of the motor. The motor structure is simple, has a small size and large wind power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and more particularly, to an electric machine and a drying device. BACKGROUND

[0002] At present, with the progress of science and technology and the development of life, people's demand for drying devices is increasing. The drying device not only provides convenience for people's life, but also is widely used in food, home, pet and other industries. However, the airflow entering the electric machine is rotating. In order to cooperate with the smooth work of the subsequent stator, other structures are needed to deflect the airflow, resulting in a complex structure of the electric machine and an increase in production cost. SUMMARY

[0003] The present application provides an electric machine and a drying device.

[0004] According to a first aspect of the present application, the embodiments of the present application provide an electric machine, which comprises a shell, a support, a driving assembly, a support frame and an impeller. The shell is provided with a receiving cavity, the receiving cavity penetrates the shell along the axial direction of the electric machine, the support is arranged in the receiving cavity, the support comprises a support seat and a plurality of support portions, the support seat is arranged in a spaced manner with the shell, and the support portions are arranged in a spaced manner in sequence and connected to the support seat to form an air inlet of the electric machine. The driving assembly is arranged in the receiving cavity and arranged in parallel with the support along the axial direction, the driving assembly comprises a stator assembly and a rotor, the stator assembly is fixedly arranged on the support, and the rotor is arranged in the stator assembly. The support frame is arranged in the receiving cavity and located on the side of the driving assembly away from the support, the support frame comprises a center seat and a plurality of support portions, the center seat is arranged in a spaced manner with the shell, and the support portions are arranged in a spaced manner in sequence and connected to the center seat. The impeller is arranged on the side of the support frame away from the driving assembly and connected to the rotor. After the impeller is driven by the rotor, the airflow is discharged outward from the support to the impeller to form an air outlet of the electric machine.

[0005] According to a second aspect of the present application, the embodiments of the present application provide a drying device, which comprises an outer shell and the above-mentioned electric machine. The outer shell is provided with a ventilation opening, the electric machine is arranged in the outer shell, and the air outlet is opposite to the ventilation opening.

[0006] In the electric machine provided by the embodiments of the present application, the support portions are arranged in a spaced manner in sequence and connected to the support seat to form an air inlet of the electric machine, the air inlet is used to guide the airflow from the outside to the inside of the electric machine. The impeller is arranged on the side of the support frame away from the driving assembly and connected to the rotor. After the impeller is driven by the rotor, the airflow is discharged outward from the support to the impeller to form an air outlet of the electric machine.

[0007] The motor defines the positions of the air inlet and air outlet by the support and the impeller, so as to define the flow direction of the airflow through the motor, that is, the airflow enters the motor from the air inlet formed by the support and then flows out from the air outlet formed by the impeller, so that the airflow entering the machine body is straight airflow, without the need to deflect the airflow, and therefore the motor does not need a structure such as a guide vane to deflect the airflow, so that the structure of the motor is simpler, and the motor can have larger wind power while ensuring a smaller size, that is, the motor can be relatively small in size while meeting the same air volume requirement. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0009] Figure 1 A structural framework schematic diagram of the air drying device provided by the embodiment of the present application is shown.

[0010] Figure 2 A structural schematic diagram of the motor provided by the embodiment of the present application is shown.

[0011] Figure 3 A structural schematic diagram of the motor is shown. Figure 2 A structural schematic diagram of another view of the motor is shown.

[0012] Figure 4 A structural schematic diagram of the motor is shown. Figure 2 An exploded structural schematic diagram of the motor is shown.

[0013] Figure 5 An exploded structural schematic diagram of the motor is shown. Figure 4 An exploded structural sectional schematic diagram of the motor is shown.

[0014] Figure 6 An exploded structural schematic diagram of the motor is shown. Figure 2 Another exploded structural schematic diagram of the motor is shown.

[0015] Figure 7 Another exploded structural schematic diagram of the motor is shown. Figure 6 Another exploded structural schematic diagram of the motor is shown.

[0016] Figure 8 A sectional schematic diagram of the motor is shown. Figure 2 A sectional schematic diagram of the motor is shown.

[0017] Figure 9 A sectional schematic diagram of the motor is shown. Figure 2 Another sectional schematic diagram of the motor is shown. DETAILED DESCRIPTION

[0018] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0019] As some terms are used in the description and claims to refer to specific components, those skilled in the art should understand that hardware manufacturers may use different names to refer to the same components. The description and claims do not distinguish components by name difference, but by functional difference. As mentioned throughout the description and claims, "including" is an open term, which should be interpreted as "including but not limited to"; "approximately" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside" and "outside" indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the present application, unless otherwise expressly specified or limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, or it can be only surface contact. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] The motor and the air drying device according to the present application will be further described below in conjunction with the specific embodiments and the accompanying drawings.

[0023] Please refer to Figure 1 The present embodiment provides a motor 100 and an air drying device 200 provided with the motor 100. The motor 100 can be applied to the air drying device 200, and the motor 100 can drive other structures of the air drying device 200 to ensure the normal operation of the air drying device 200. In the present embodiment, the type of the air drying device 200 is not limited, for example, the air drying device 200 can be a hair dryer, a dryer or the like.

[0024] In the embodiment, the air-drying device 200 comprises a housing 210 and the motor 100 described above, the motor 100 is arranged in the housing 210 to drive the air-drying device 200 to work. The housing 210 is provided with a ventilation opening 212, which is used to allow the air generated by the motor 200 to blow to the articles to be dried to achieve the effect of air-drying.

[0025] Referring to Figures 2 to 4 In the embodiment, the motor 100 comprises a housing 10, a support 30, a driving assembly 50, a bracket 70, and an impeller 90. The housing 10 is substantially cylindrical and is provided with a receiving cavity 12. The receiving cavity 12 extends through the housing 10 along the axial direction of the motor 100, and is used to accommodate the internal structures of the motor 100 such as the driving assembly 30 and the like. The support 30 is arranged in the receiving cavity 12, and is used to support the driving assembly 30 and other structures of the motor 100. The support 30 comprises a support seat 32 and a plurality of support portions 34. The support seat 32 is arranged spaced apart from the housing 10, and the support portions 34 are sequentially and spaced apart arranged at the outer periphery of the support seat 32 and are connected to the support seat 32 to form an air inlet 101 of the motor 100, which is used to guide the airflow from the outside to the inside of the motor 100. The driving assembly 50 is arranged in the receiving cavity 12 and is arranged axially parallel to the support 30. The driving assembly 50 comprises a stator assembly 52 and a rotor 54. The stator assembly 52 is fixedly arranged on the support 30, and the rotor 54 is arranged in the stator assembly 52 and can convert electrical energy into mechanical energy in cooperation with the stator assembly 30. The bracket 70 is arranged in the receiving cavity 12 and is located on the side of the driving assembly 50 away from the support 30. The bracket 70 is used to cooperate with the support 30 to jointly support the stator assembly 52 and other structures of the motor 100. The bracket 70 comprises a center seat 72 and a plurality of support portions 74. The center seat 72 is arranged spaced apart from the housing 10, and the support portions 74 are sequentially and spaced apart arranged at the outer periphery of the center seat 72 and are connected to the center seat. The impeller 90 is arranged on the side of the bracket 70 away from the driving assembly 50 and is connected to the rotor 54. The impeller is driven by the rotor 54 to discharge the airflow outwardly from the support 30 to the direction of the impeller 90 to form an air outlet 103 of the motor 100.

[0026] The motor 100 defines the positions of the air inlet 101 and the air outlet 103 through the support 30 and the impeller 90, so as to define the flow direction of the air flow through the motor 100, i.e. the air flow enters the motor 100 from the air inlet 101 formed by the support 30 and then flows out from the air outlet 103 formed by the impeller 90, so that the air flow entering the motor body is straight air flow and does not need to be deflected. Therefore, compared with the traditional motor with an impeller, the motor 100 of the present application does not need a guide vane or other structure for deflecting the air flow, so that the structure of the motor 100 is simpler, and the motor 100 can have a larger wind power while ensuring a smaller size. That is, the motor 100 can have a relatively small size while meeting the same air volume requirement.

[0027] Referring to Figures 5 to 8 In the present embodiment, the housing 10 includes a first housing 14 and a second housing 16, and the first housing 14 and the second housing 16 are connected in series along the axial direction of the motor 100. The accommodating cavity 12 extends through the first housing 14 and the second housing 16, and the accommodating cavity 12 is used to accommodate other structures of the motor 100.

[0028] Specifically, in the present embodiment, the first housing 12 is provided with a first cavity 141 extending through the first housing 14 in the axial direction, and the first cavity 141 is used to accommodate the support 30. The first housing 14 further includes a first portion 143 and a second portion 145 connected in series, and the inner diameter of the first portion 143 is smaller than the inner diameter of the second portion 145, so that a support step 147 is formed at the connection between the first portion 143 and the second portion 145, and the support step 147 is used to support or limit the outer wall of the stator assembly 30, so as to make the installation of the stator assembly 30 more stable. Further, the radial thickness of the support step 147 is substantially the same as the radial thickness of the outer wall of the stator assembly 30, which can improve the supporting effect of the support step 147 and improve the structural stability of the motor 100.

[0029] It should be understood that in some other embodiments, the relationship between the inner diameter of the first portion 143 and the inner diameter of the second portion 145 is not limited, for example, the inner diameter of the first portion 143 can be equal to the inner diameter of the second portion 145, and for example, the inner diameter of the first portion 143 can be greater than the inner diameter of the second portion 145.

[0030] Specifically, in the embodiment, the second shell 16 is provided with a second cavity 161 penetrating through the second shell 16 in the axial direction, the second cavity 161 is communicated with the first cavity 141 to form the accommodating cavity 12, and the second cavity 161 is used for accommodating the bracket 70. The second shell 16 further comprises a third portion 163 and a fourth portion 165 which are sequentially connected, the inner diameter of the third portion 163 is smaller than the inner diameter of the fourth portion 165, so that a mounting step 167 is formed at the connection position of the third portion 163 and the fourth portion 165, the mounting step 167 is used for supporting or limiting the outer wall of the stator assembly 30, so that the mounting of the stator assembly 30 is more stable. Further, the radial thickness of the mounting step 167 is substantially consistent with the radial thickness of the outer wall of the stator assembly 30, which can improve the supporting or limiting effect of the mounting step 167 and improve the structural stability of the motor 100.

[0031] It should be understood that, in other embodiments, the relationship between the inner diameter of the third portion 163 and the inner diameter of the fourth portion 165 is not limited, for example, the inner diameter of the third portion 163 can be equal to the inner diameter of the fourth portion 165, and for example, the inner diameter of the third portion 163 can be greater than the inner diameter of the fourth portion 165.

[0032] In the embodiment, the first shell 14 and the second shell 16 are both provided with steps, which can improve the supporting effect of the step 167. It should be understood that, in other embodiments, in order to simplify the structure of the motor 100, one of the first shell 14 and the second shell 16 can be provided with a step, or neither of the first shell 14 and the second shell 16 is provided with a step, which is not limited in the application.

[0033] In the embodiment, the support 30 is mounted in the first shell 14, and the support seat 32 is arranged in the accommodating cavity 12 and spaced from the inner wall of the first shell 14. Specifically, the support seat 32 is arranged in the first cavity 141 and fixedly connected to the first shell 14. Further, the support seat 32 is provided with a first shaft hole 321 located at a substantially middle position of the support seat 32, the first shaft hole 321 is communicated with the first cavity 141 to allow part of the structure of the driving assembly 50 to pass through. Each support portion 34 is connected between the support seat 32 and the first shell 14, and a plurality of support portions 34 are sequentially and spacedly arranged along the circumferential direction of the support seat 32, and each adjacent two support portions 34 form an air inlet 101.

[0034] In this embodiment, the stator assembly 52 includes a stator yoke 521 and a plurality of stator teeth 523. The stator teeth 523 are connected to the inner peripheral wall of the stator yoke 521 and are arranged sequentially at intervals along the circumference of the stator yoke 521. An air duct 525 is formed between each two adjacent stator teeth 523. The air duct 525 passes through the stator yoke 521 axially and is connected to the air inlet 101. The air duct 525 can serve as a heat dissipation air duct for the motor 100, guiding part of the airflow to the stator assembly 52 to achieve the purpose of heat dissipation.

[0035] Specifically, in this embodiment, the stator yoke 521 and the support base 32 are arranged side by side along the axial direction. The stator yoke 521 is generally annular in structure, and has an outer wall 5213 that surrounds the circumference. The outer wall 5213 is opposite to and overlaps with the inner wall of the first housing 14. Specifically, one end face of the stator yoke 521 is overlapped on the support step 147 and spaced apart from the end face of the support portion 34. The other end face of the stator yoke 521 is overlapped on the mounting step 167 and spaced apart from the end face of the bracket 20, thereby limiting the installation position of the stator assembly 52. ​​Further, in order to position the stator yoke 521, the stator yoke 521 and the first housing 14 can be mutually limited by positioning portions. For example, the inner wall of the first housing 14 is provided with a first positioning portion 149, and the outer periphery of the stator yoke 521 is provided with a second positioning portion 5211 (e.g., ...). Figure 9 As shown, the first positioning part 149 and the second positioning part 5211 are nested together to make the connection between the stator assembly 52 and the first housing 14 more secure and the positioning more reliable, preventing rotation. Further, in this embodiment, the specific cooperation method of the first positioning part 149 and the second positioning part 5211 is not limited. One of the first positioning part 149 and the second positioning part 5211 is a protrusion, and the other is a groove. Both the protrusion and the groove extend axially, with the protrusion embedded in the groove to limit the position of the stator yoke 521 relative to the first housing 14. For example, the first positioning part 149 can be a groove, and the second positioning part 5211 can be a protrusion that cooperates with the groove; or, for example, the first positioning part 149 can be a protrusion, and the second positioning part 5211 can be a groove that cooperates with the protrusion.

[0036] Furthermore, the number of the first positioning part 149 and the second positioning part 5211 in this specification is not limited. In this embodiment, there can be six first positioning parts 149, and the six first positioning parts 5211 are equally spaced on the inner wall of the first housing 14. Correspondingly, there are also six second positioning parts 5211. The six second positioning parts 5211 and the first positioning parts 149 are nested in a one-to-one correspondence to improve the stability of the connection between the stator assembly 50 and the first housing 14.

[0037] In the embodiment, the stator yoke 521 is mounted to substantially adhere to the inner wall of the first shell 14, the internal space of the first shell 14 is fully utilized, the diameter of the stator yoke 521 can be relatively large, and the output power of the rotor 54 is large under the condition that the volume of the motor 100 is constant (or limited), so the air outlet wind power is large; under the premise of meeting a certain power, the overall volume of the motor 100 can be relatively small.

[0038] In some embodiments, in order to enhance the heat dissipation effect of the motor 100, for example, to enhance the heat dissipation effect of the stator yoke 521, the motor 100 can further be provided with a wind guide groove 105 between the stator yoke 521 and the shell 10, the wind guide groove 105 can make the airflow better circulate in the motor 100, and ensure the temperature balance in the motor 100. Further, in the embodiment, the specific setting position of the wind guide groove 105 is not limited, for example, the wind guide groove 105 can be provided on at least one of the outer wall 5213 of the stator yoke 521 and the inner wall of the first shell 14, so that at least part of the structure of the outer wall 5213 and the inner wall of the first shell 14 is arranged in a spaced manner. One end of the wind guide groove 105 communicates with the space on one side of the stator yoke 52 close to the support 3030, and the other end communicates with the space on the side of the stator yoke 52 away from the support 30, so that the airflow better circulates in the motor 100. Further, the number of wind guide grooves 105 can be multiple, and the multiple wind guide grooves 105 are arranged in sequence to improve the circulation area and heat dissipation efficiency of the airflow. In some specific examples, the wind guide groove 105 can be a straight groove, or can be an arc-shaped groove, or can be an irregular groove, for example, the wind guide groove 105 can be spirally wrapped around the outer wall 5213 of the stator yoke 521, which can rectify and guide the airflow, enhance the stability of air pressure fluctuation, and reduce wind noise.

[0039] In the embodiment, the wind guide groove 105 can be formed by the recessed structures on the stator yoke 521 and the shell 10. The outer wall 5213 of the stator yoke 521 and the inner wall of the shell 10 are provided with grooves, the grooves of the outer wall 5213 and the grooves of the inner wall of the shell 10 are arranged one by one, and the grooves of the outer wall 5213 and the corresponding grooves of the inner wall of the shell 10 communicate with each other to form the wind guide groove 105. It should be understood that in other embodiments, in order to simplify the structure of the motor 100, one of the outer wall 5213 of the stator yoke 521 and the inner wall of the shell 10 is provided with a groove, for example, in some embodiments, the outer wall 5213 of the stator yoke 521 is provided with a groove to form the wind guide groove 105, and in some other embodiments, the inner wall of the shell 10 is provided with a groove to form the wind guide groove 105.

[0040] In the present embodiment, the air guide groove 105 can be formed by the outer wall 5213 of the stator yoke 521 and the recessed structure of the inner wall of the housing 10. The outer wall 5213 of the stator yoke 521 and the inner wall of the housing 10 are each provided with a groove, the grooves of the outer wall 5213 and the inner wall of the housing 10 are arranged one by one, and the grooves of the outer wall 5213 and the corresponding grooves of the inner wall of the housing 10 communicate with each other to form the air guide groove 105. It should be understood that in other embodiments, in order to simplify the structure of the motor 100, one of the outer wall 5213 of the stator yoke 521 and the inner wall of the housing 10 is provided with a groove, for example, in some embodiments, the outer wall 5213 of the stator yoke 521 is provided with a groove to form the air guide groove 105, and in other embodiments, the inner wall of the housing 10 is provided with a groove to form the air guide groove 105.

[0041] In the present embodiment, a plurality of stator teeth 523 are distributed around the inner circumferential wall of the stator yoke 521 and extend into the hole of the stator yoke 521. The plurality of stator teeth 523 collectively form a second shaft hole 527 away from one side of the stator yoke 521, the second shaft hole 527 is located at a substantially middle position of the stator assembly 30, and the second shaft hole 527 communicates with the first cavity 141 and the second cavity 161. The second shaft hole 527 is used to install the rotor 54 of the motor 100.

[0042] In the present embodiment, the stator assembly 52 further comprises a stator winding 529, and a plurality of stator windings 529 are arranged one by one around the plurality of stator teeth 523 to generate a rotating magnetic field. Further, the length dimension L1 of the stator teeth 523 along the radial direction of the stator yoke 521 is less than the width dimension L2 of the stator winding 529 along the circumferential direction of the stator yoke 34 (as shown in Figure 9 The air flow to the stator winding 529 is more smooth, and the volume of the motor 100 can be greatly reduced while the performance of the motor 100 remains unchanged, thereby reducing the manufacturing cost of the motor 100.

[0043] In the embodiment, one end of the stator assembly 52 is directly and separately arranged opposite to the support 30, and the other end is directly and separately arranged opposite to the bracket 70, so that no other element is arranged between the stator assembly 52 and the support 30, and the distance therebetween can be limited within 1mm-2cm; and no other element is arranged between the stator assembly 52 and the bracket 70, and the distance therebetween can be limited within 1mm-2cm. Therefore, no guide blade or the like structure in the prior art needs to be arranged between the stator assembly 52 and the support 30, and no guide blade or the like structure in the prior art needs to be arranged between the stator assembly 52 and the bracket 70, so that the motor 100 has a larger wind power while meeting a smaller size. Further, the impeller 90, the bracket 70, the stator assembly 52 and the support 30 are sequentially arranged along the axial direction of the motor 100, so that the motor 100 has a simple structure, is easy to manufacture and assemble, and can effectively control the manufacturing cost of the motor 100.

[0044] In the embodiment, the driving assembly 50 further comprises a central shaft 56, which is arranged through the support 30 and the bracket 70 and connected to the impeller 90. Specifically, in the embodiment, the central shaft 56 is sequentially arranged through the support 30, the rotor 54 and the bracket 70, and has opposite first and second sections 561 and 563, which are sequentially connected along the axial direction and respectively protrude relative to the two ends of the rotor 54. In some embodiments, the first and second sections 561 and 563 can be integrally formed, and in other embodiments, the first and second sections 561 and 563 can be assembled. The first section 561 is arranged through the support 30, specifically, the first section 561 is arranged through the first shaft hole 321 of the support seat 32 and protrudes relative to the support seat 32 away from the stator assembly 52. The second section 563 is arranged through the bracket 70, specifically, the second section is arranged through the central seat 72 and protrudes relative to the central seat 72 away from the stator assembly 52.

[0045] In the embodiment, the rotor 54 is rotatably arranged in the stator assembly 52 and sleeved on the central shaft 56. In operation, the current input to the stator winding 529 of the stator assembly 52 generates a magnetic field, the rotor 54 rotates and drives the impeller 90 to rotate, so as to discharge the airflow in the motor 100 outward from the support 30 to the direction of the impeller 90.

[0046] In this embodiment, the support member 70 is installed inside the second housing 16, and the central seat 72 is disposed inside the receiving cavity 12 and spaced apart from the inner wall of the second housing 16. Specifically, the central seat 72 is disposed inside the second cavity 161 and fixedly connected to the second housing 16. Further, the central seat 72 is provided with a third shaft hole 721, which is located approximately at the center of the support 72 and communicates with the second cavity 161 to allow the central shaft 56 to pass through. Support parts 74 are connected between the support 72 and the second housing 16, and multiple support parts 74 are arranged sequentially at intervals along the circumference of the central seat 72.

[0047] In this embodiment, in order to improve the stability of the central shaft 56 within the motor 100, the motor 100 further includes a first bearing 107 and a second bearing 109. The first bearing 107 is sleeved on the first segment 561 and located between the first segment 561 and the support member 30. The second bearing 109 is sleeved on the second segment 563 and located between the second segment 561 and the bracket 70. The first bearing 107 and the second bearing 109 are used together to fix the central shaft 56, increase the working stability of the motor 100, thereby reducing noise and extending the service life of the motor 100.

[0048] Specifically, in this embodiment, the first bearing 107 is disposed within the first shaft hole 321 of the support base 32 and sleeved on the first segment 561. The first bearing 107 is used to fix the first segment 561, reduce the vibration of the first segment 561 of the central shaft 50, and make the first segment 561 of the central shaft 50 more stable. The second bearing 109 is disposed within the third shaft hole 721 of the central base 72 and sleeved on the second segment 563. The second bearing 109 is used to fix the second segment 563, reduce the vibration of the second segment 563 of the central shaft 50, and make the second segment 563 of the central shaft 50 more stable.

[0049] In this embodiment, the impeller 90 includes a hub 92 and multiple blades 94. The hub 92 is disposed in the second cavity 161 of the second housing 16, and the hub 92 and the stator assembly 52 are respectively located on opposite sides of the center seat 72. The blades 94 are plate-like structures with curved surfaces, and multiple blades 94 are sequentially distributed on the outer side of the hub 92 to form the air outlet 103 of the motor 100, which is opposite to the ventilation port 212. This specification does not limit the number of blades 94. For example, the number of blades 94 can be greater than or equal to 11 and less than or equal to 16. In this embodiment, the number of blades 94 can be 15. In this embodiment, the multiple blades 94 are driven by the rotor 54 to discharge airflow from the support member 30 towards the impeller 90 to complete the cooling of the internal structure of the motor 100 by the airflow.

[0050] The motor provided by the embodiment of the present application is characterized in that the support parts are sequentially and spacedly arranged and connected to the support base to form an air inlet of the motor, the air inlet is used to guide the airflow from the outside to the inside of the motor, the impeller is arranged on the side of the support away from the driving assembly and connected to the rotor, and the airflow is discharged outward from the support to the impeller after the impeller is driven by the rotor to form an air outlet of the motor.

[0051] The motor is characterized in that the position of the air inlet and the air outlet is defined by the support and the impeller, so that the flow direction of the airflow through the motor can be defined, i.e., the airflow enters the motor from the air inlet formed by the support and then flows out from the air outlet formed by the impeller, so that the airflow entering the motor body is straight airflow and does not need to be deflected, and therefore the motor does not need a structure such as a guide vane to deflect the airflow, so that the structure of the motor is simpler, and the motor can have a larger wind power while ensuring a smaller size, i.e., the motor can have a relatively smaller size while meeting the same air volume requirement.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0053] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric motor, characterized in that, include: The housing has a receiving cavity that extends through the housing along the axial direction of the motor; A support member is disposed in the receiving cavity. The support member includes a support base and a plurality of support parts. The support base is spaced apart from the housing. The support parts are sequentially spaced apart and connected to the support base to form the air inlet of the motor. A drive assembly is disposed within the receiving cavity and arranged parallel to the support member along the axial direction; the drive assembly includes a stator assembly and a rotor, the stator assembly is fixedly disposed within the support member, and the rotor is disposed within the stator assembly; A bracket is disposed within the receiving cavity and located on the side of the drive assembly opposite to the support member; the support member, the drive assembly, and the bracket are coaxial and arranged side by side; the bracket includes a central seat and a plurality of support portions, the central seat being spaced apart from the housing, and the support portions being sequentially spaced apart and connected to the central seat; and An impeller is disposed on the side of the bracket away from the drive assembly and connected to the rotor. The support, the drive assembly, and the bracket together define a straight channel extending along the axial direction. After being driven by the rotor, the impeller discharges airflow outward from the straight channel toward the impeller to form the air outlet of the motor. The air outlet and the air inlet are located on the path of the straight channel. No airflow deflection structure is provided on the straight channel.

2. The motor as described in claim 1, characterized in that, The stator assembly includes a stator yoke and a plurality of stator teeth. The stator yoke and the support base are arranged side by side along the axial direction. The stator teeth are connected to the inner peripheral wall of the stator yoke and are arranged at intervals along the circumference of the stator yoke. An air duct is formed between each two adjacent stator teeth and the air duct is connected to the air inlet.

3. The motor as described in claim 2, characterized in that, The drive assembly further includes a plurality of stator windings, which are wound one-to-one on the stator teeth. The ratio of the radial length of the stator teeth along the stator yoke to the circumferential width of the stator windings along the stator yoke is greater than or equal to 2.

4. The motor as described in claim 2, characterized in that, The housing includes a first housing and a second housing, which are connected along the axial direction. The receiving cavity passes through the first housing and the second housing. The support is installed inside the first housing, and the bracket is installed inside the second housing. The inner wall of the first housing is provided with a first positioning part, and the outer periphery of the stator yoke is provided with a second positioning part. The first positioning part and the second positioning part are nested together.

5. The motor as described in claim 4, characterized in that, One of the first positioning part and the second positioning part is a protrusion, and the other is a groove. Both the protrusion and the groove extend along the axial direction, and the protrusion is embedded in the groove.

6. The motor as described in claim 4, characterized in that, The first housing includes a first part and a second part that are connected to each other. The inner diameter of the first part is smaller than the inner diameter of the second part, so that a support step is formed at the connection between the first part and the second part, and the stator yoke is stacked on the support step. or / and The second housing includes a third part and a fourth part that are connected to each other. The inner diameter of the third part is smaller than the inner diameter of the fourth part, so that a mounting step is formed at the connection between the third part and the fourth part, and the stator yoke is stacked on the mounting step.

7. The motor as described in claim 4, characterized in that, The stator yoke has a circumferentially surrounding outer wall, which is opposite to and superimposed on the inner wall of the first housing. At least one of the outer wall and the inner wall of the first housing is provided with an air guide groove, so that at least a portion of the structure of the outer wall and the inner wall of the first housing are spaced apart. One end of the air guide groove communicates with the space on the side of the stator yoke near the support member, and the other end communicates with the space on the side of the stator yoke away from the support member.

8. The motor according to any one of claims 1-7, characterized in that, The drive assembly also includes a central shaft, which passes through the support member and the bracket and is connected to the impeller, and the rotor is sleeved on the central shaft.

9. The motor as described in claim 8, characterized in that, The motor further includes a first bearing and a second bearing, the first bearing being rotatably disposed between the central shaft and the support base, and the second bearing being rotatably disposed between the central shaft and the central base.

10. A drying device, characterized in that, include: The outer casing has ventilation openings; as well as The motor according to any one of claims 1-9, wherein the motor is disposed within the housing, and the air outlet is opposite to the ventilation opening.

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