CN219760726U - Motor and air drying equipment - Google Patents

Abstract

The utility model relates to a motor and air drying equipment. The motor comprises a shell, a bracket, a stator assembly, a rotor, a central shaft, a supporting piece, a first bearing and a second bearing. The shell is provided with a containing cavity which penetrates through the shell along the axial direction of the motor; the inner wall of casing is equipped with first location portion, and support and stator module set up in holding the intracavity, and set up side by side along the axial, and stator module's periphery is equipped with second location portion, and first location portion and second location portion nest each other and set up, and rotor rotationally sets up in stator module. The center pin wears to locate rotor and support, and the center pin has relative first section and second section, and first section and second section are protruding for the both ends of rotor respectively, and support piece sets up in holding the intracavity and connects in the casing, and support piece is worn to locate to the second section. The first bearing sleeve is arranged on the first section and is positioned between the first section and the support, and the second bearing sleeve is arranged on the second section and is positioned between the second section and the support. The motor is stable in operation and low in noise.

Description

Motor and air drying equipment

Technical Field

The utility model relates to the technical field of motors, in particular to a motor and air drying equipment.

Background

At present, with the progress of science and technology and the development of life, people have more and more demands on air drying equipment, and the air drying equipment not only can provide convenience for the life of people, but also can be widely applied to industries such as food, home furnishings, pets and the like. However, along with the continuous improvement of the power of the air drying equipment, the motor rotating speed is also continuously improved, so that the motor is easy to shake during working, and the internal structure is unstable, so that potential safety hazards are caused.

Disclosure of Invention

The embodiment of the utility model provides a motor and air drying equipment.

According to a first aspect of the utility model, an embodiment of the utility model provides an electric machine comprising a housing, a bracket, a stator assembly, a rotor, a central shaft, a support, a first bearing and a second bearing. The shell is provided with a containing cavity which penetrates through the shell along the axial direction of the motor; the inner wall of casing is equipped with first location portion, and the support sets up in holding the intracavity and connects in the casing, and stator module sets up in holding the intracavity, and stator module and support set up side by side along the axial, and stator module's periphery is equipped with second location portion, and first location portion and second location portion nest each other and set up, and rotor rotationally sets up in stator module. The center pin wears to locate rotor and support, and the center pin has relative first section and second section, and first section and second section are protruding for the both ends of rotor respectively, and support piece sets up in holding the intracavity and connects in the casing, and support piece is worn to locate to the second section. The first bearing sleeve is arranged on the first section and is positioned between the first section and the support, and the second bearing sleeve is arranged on the second section and is positioned between the second section and the support.

In some embodiments, the bracket includes a central seat and a plurality of air guide sheets, and the plurality of air guide sheets are sequentially and alternately arranged at the periphery of the central seat so as to divide the accommodating cavity into a plurality of first air channels; the stator assembly comprises a stator yoke and a plurality of stator teeth, wherein the stator teeth are connected to the inner peripheral wall of the stator yoke and are sequentially arranged at intervals along the circumferential direction of the stator yoke; a second air channel is formed between every two adjacent stator teeth; each second air channel is communicated with at least one first air channel to jointly form a main air channel of the motor, and the main air channel axially penetrates through the shell.

In some embodiments, the stator assembly further includes a plurality of stator windings wound around the stator teeth in a one-to-one correspondence, and a length dimension of the wind guiding plate along the axial direction is smaller than a length dimension of the stator teeth along the axial direction of the stator yoke.

In some embodiments, a ratio of a length dimension of the stator teeth along a radial direction of the stator yoke to a width dimension of the stator windings along a circumferential direction of the stator yoke is greater than or equal to 2.

In some embodiments, the first section is disposed through the support, the motor further includes a third bearing, the third bearing is sleeved on the first section and located between the first section and the support, and the first bearing and the third bearing are disposed in parallel along an axial direction.

In some embodiments, the support further comprises a center seat disposed in the accommodating cavity and fixedly connected to the housing, the first section is disposed through the center seat, the third bearing and the first bearing are disposed in the center seat, and the third bearing is disposed between the first bearing and the rotor.

In some embodiments, the support is provided with a plurality of vents in communication with the receiving cavity and the outside world.

In some embodiments, the support member includes a base and a plurality of support portions, the base is disposed in the accommodating cavity and spaced from the inner wall of the housing; the supporting piece is connected between the seat body and the shell, and the plurality of supporting parts are sequentially arranged at intervals along the circumferential direction of the seat body; a ventilation opening is formed between every two adjacent supporting parts.

In some embodiments, the housing includes a first housing and a second housing, the first housing and the second housing being axially continuous, the receiving cavity extending through the first housing and the second housing; the support is installed in first casing, and support piece is installed in the second casing.

In some embodiments, the first housing includes a first portion and a second portion connected to each other, the first portion having an inner diameter smaller than an inner diameter of the second portion, such that a connection between the first portion and the second portion forms a first support step, and the stator assembly is stacked on the first support step; or/and the second shell comprises a third part and a fourth part which are connected with each other, wherein the inner diameter of the third part is smaller than that of the fourth part, so that a second supporting step is formed at the joint of the third part and the fourth part, and the stator assembly is overlapped on the second supporting step.

In some embodiments, one of the first positioning portion and the second positioning portion is a protrusion, the other one is a groove, the protrusion and the groove extend along the axial direction, and the protrusion is embedded in the groove.

In some embodiments, the motor further comprises an impeller disposed on a side of the bracket facing away from the stator assembly and connected to the central shaft.

According to a second aspect of the present utility model, an embodiment of the present utility model provides an air drying apparatus, including a housing and the above-mentioned motor, the housing is provided with an air outlet, the motor is disposed in the housing, and the stator assembly is located between the support and the air outlet.

In the motor provided by the embodiment of the utility model, the stator assembly and the shell can be mutually limited through the positioning structure, specifically, the inner wall of the shell is provided with the first positioning part, the periphery of the stator assembly is provided with the second positioning part, and the first positioning part and the second positioning part are mutually nested, so that the stator assembly and the shell are more firmly connected, are reliably positioned and are not easy to rotate relatively. The center shaft is provided with a first section and a second section which are opposite, the first bearing is sleeved on the first section and is positioned between the first section and the bracket, the second bearing is sleeved on the second section and is positioned between the second section and the supporting piece, and the first bearing and the second bearing are jointly used for supporting the center shaft.

The motor supports the central shaft through the first bearing and the second bearing, so that both ends of the central shaft are supported, and the shaking of the central shaft can be reduced by utilizing the rotation performance of the bearing and a small amount of supporting elasticity, so that the central shaft and the motor are more stable, and the running noise is relatively smaller. Further, the stator assembly and the shell are nested with each other through the first positioning part and the second positioning part, so that the positioning operation between the stator assembly and the shell is simpler, and the positioning accuracy is high.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural frame of an air drying apparatus according to an embodiment of the present utility model.

Fig. 2 shows a schematic structural diagram of a motor according to an embodiment of the present utility model.

Fig. 3 shows a schematic structural view of the motor of fig. 2 from another perspective.

Fig. 4 shows an exploded view of the motor of fig. 2.

Fig. 5 shows a schematic cross-sectional view of an exploded structure of the motor shown in fig. 4.

Fig. 6 shows an exploded view of the motor of fig. 2 from another perspective.

Fig. 7 shows a schematic cross-section of the motor of fig. 2.

Fig. 8 shows another schematic cross-sectional view of the motor of fig. 2.

Fig. 9 shows a schematic cross-sectional view of the motor of fig. 2 from another perspective.

Fig. 10 shows another schematic cross-sectional view of the motor of fig. 2.

Detailed Description

In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As a particular component is referred to by some of the terms used in the description and claims, it should be understood by those skilled in the art that a hardware manufacturer may refer to the same component by different terms. The description and claims do not take the difference in name as a way of distinguishing between components, but rather take the difference in functionality of the components as a criterion for distinguishing. As used throughout the specification and claims, the word "comprise" and "comprises" are to be construed as "including, but not limited to"; by "substantially" is meant that a person skilled in the art can solve the technical problem within a certain error range, essentially achieving the technical effect.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like indicate orientation or positional relationships based on those shown in the drawings, and are merely used for convenience in describing the present utility model, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly, unless otherwise specifically indicated or defined. For example, the connection can be fixed connection, detachable connection or integral connection; can be mechanically or electrically connected; the connection may be direct, indirect via an intermediate medium, or communication between two elements, or only surface contact. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The motor and air drying apparatus according to the present utility model will be further described with reference to the following detailed description and accompanying drawings.

Referring to fig. 1, the embodiment of the present utility model provides a motor 100 and an air drying apparatus 200 provided with the motor 100, wherein the motor 100 can be applied to the air drying apparatus 200, and the motor 100 can drive other structures of the air drying apparatus 200 to ensure that the air drying apparatus 200 works normally. In the present embodiment, the kind of the air drying apparatus 200 is not limited, and for example, the air drying apparatus 200 may be a blower, a dryer, or the like.

In the present embodiment, the air drying apparatus 200 includes the housing 210 and the motor 100 described above, and the motor 100 is disposed in the housing 210 to drive the air drying apparatus 200 to operate. The housing 210 is provided with an air outlet 212, and the air outlet 212 is used for allowing air generated by the motor 200 to blow toward the articles to be air-dried to achieve the air-drying effect.

Referring to fig. 2 to 4, in the present embodiment, the motor 100 includes a housing 10, a bracket 20, a stator assembly 30, a rotor 40, a central shaft 50, a support 60, a first bearing 70, and a second bearing 80. The housing 10 is generally cylindrical and is provided with a receiving cavity 12 (fig. 5). The housing chamber 12 penetrates the housing 10 in the axial direction of the motor 100, and the housing chamber 12 is used for housing internal structures of the motor 100 such as the rotor 40, the stator assembly 30, and the like. The bracket 20 is disposed in the accommodating chamber 12 and connected to the housing 10, and the bracket 20 is used for supporting the stator assembly 30 and other structures of the motor 100. The stator assembly 30 is disposed within the receiving chamber 12 and axially juxtaposed with the bracket 20. The stator assembly 30 and the shell 10 can be limited by each other through a positioning structure, specifically, the inner wall of the shell 10 is provided with a first positioning part 14, the periphery of the stator assembly 30 is provided with a second positioning part 32, and the first positioning part 14 and the second positioning part 32 are nested with each other, so that the stator assembly 30 and the shell 10 are more firmly connected, and the stator assembly is reliably positioned and is not easy to rotate. The rotor 40 is rotatably disposed within the stator assembly 30 and is capable of converting electrical energy into selected mechanical energy in cooperation with the stator assembly 30.

Referring to fig. 5, a central shaft 50 is disposed through the rotor 40 and the support 20, the central shaft 50 has a first section 52 and a second section 54 opposite to each other, and the first section 52 and the second section 54 respectively protrude from two ends of the rotor 40, i.e. two ends of the central shaft 50 respectively protrude from two end surfaces of the rotor 40. A support 60 is disposed within the receiving cavity 12 and coupled to the housing 10, the support 60 being adapted to cooperate with the bracket 20 to cooperatively support the stator assembly 30 and other structures of the motor 100. The first bearing 70 is sleeved on the first section 52 and is located between the first section 52 and the bracket 20, the second bearing 80 is sleeved on the second section 54 and is located between the second section 52 and the supporting member 60, and the first bearing 70 and the second bearing 80 are used together to support the central shaft 50.

The motor supports the central shaft 50 through the first bearing 70 and the second bearing 80, so that both ends of the central shaft 50 are supported, and thus, the shaking of the central shaft 50 can be reduced by using the rotation performance of the bearing and a small amount of supporting elasticity, so that the central shaft 50 and the motor 100 are more stable and have relatively less operation noise. Further, the stator assembly 30 and the housing 10 are nested with each other through the first positioning portion 14 and the second positioning portion 32, so that the positioning operation between the stator assembly 30 and the housing 10 is simpler and the positioning accuracy is high.

Referring to fig. 5 to 6, in the present embodiment, the housing 10 includes a first housing 16 and a second housing 18, and the first housing 16 and the second housing 18 are connected along an axial direction of the motor 100. The housing cavity 12 penetrates the first housing 16 and the second housing 18, and the housing cavity 12 is used for housing other structures of the motor 100.

In this embodiment, the first housing 16 is provided with a first cavity 161, the first cavity 161 penetrates the first housing 16 along an axial direction, and the first cavity 161 is used for accommodating the bracket 20. The first housing 16 includes a first portion 163 and a second portion 165 that are connected to each other, and an inner diameter of the first portion 163 is smaller than an inner diameter of the second portion 165, so that a connection between the first portion 163 and the second portion 165 forms a first supporting step 167, and the first supporting step 167 is used for supporting or limiting an outer wall of the stator assembly 30, so that the stator assembly 30 is more firmly installed. Further, the radial thickness of the first supporting step 167 is substantially identical to the radial thickness of the outer wall of the stator assembly 30, so that the bearing effect of the first supporting step 167 can be improved, and the structural stability of the motor 100 can be improved.

It should be appreciated that in other embodiments, the relationship between the inner diameter of first portion 163 and the inner diameter of second portion 165 is not limited, e.g., the inner diameter of first portion 163 may be equal to the inner diameter of second portion 165, and as another example, the inner diameter of first portion 163 may be greater than the inner diameter of second portion 165.

In this embodiment, the second housing 18 is provided with a second cavity 181, the second cavity 181 penetrates the second housing 18 in the axial direction, the second cavity 181 communicates with the first cavity 161 to form the accommodating cavity 12, and the second cavity 181 is used for accommodating the supporting member 60. The second housing 18 further includes a third portion 183 and a fourth portion 185 connected to each other, wherein an inner diameter of the third portion 183 is smaller than an inner diameter of the fourth portion 185, such that a connection between the third portion 183 and the fourth portion 185 forms a second supporting step 187, and the second supporting step 187 is used for supporting or limiting an 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 second supporting step 187 is substantially identical to the radial thickness of the outer wall of the stator assembly 30, so that the bearing effect of the second supporting step 187 can be improved, and the structural stability of the motor 100 can be improved.

It should be appreciated that in other embodiments, the relationship between the inner diameter of third portion 183 and the inner diameter of fourth portion 185 is not limited, e.g., the inner diameter of third portion 183 may be equal to the inner diameter of fourth portion 185, and as another example, the inner diameter of third portion 183 may be greater than the inner diameter of fourth portion 185.

In this embodiment, the first housing 16 and the second housing 18 are provided with supporting steps, so as to improve the bearing effect of the supporting steps, it should be understood that in other embodiments, in order to simplify the structure of the motor 100, one of the first housing 16 and the second housing 18 may be provided with supporting steps, or neither the first housing 16 nor the second housing 18 may be provided with supporting steps, which is not a limitation of the present utility model.

In the present embodiment, the bracket 20 is mounted in the first housing 16, and the bracket 20 includes a center seat 22 and a plurality of air guiding fins 24, wherein the center seat 22 is used for connecting with the air guiding fins 24. The center seat 22 is disposed in the accommodating chamber 12 and fixedly connected to the housing 10. In this embodiment, the center seat 22 is disposed in the first cavity 161 and spaced from the inner wall of the first housing 16. Further, the center seat 22 is provided with a first shaft hole 221, the first shaft hole 221 is located at a substantially middle position of the center seat 22, and the first shaft hole 221 is communicated with the first cavity 161 for the central shaft 50 to pass through. The plurality of air guide plates 24 are sequentially arranged at intervals along the circumferential direction of the first housing 16, each air guide plate 24 is connected between the first housing 16 and the center seat 22, the plurality of air guide plates 24 are sequentially arranged at intervals on the periphery of the center seat 22, so that the accommodating cavity 12 is divided into a plurality of first air channels 121, and the first air channels 121 are used for guiding the flow direction of air flow.

In this embodiment, the stator assembly 30 includes a stator yoke 34 and a plurality of stator teeth 36, the stator teeth 36 are connected to an inner peripheral wall of the stator yoke 34 and are sequentially spaced along a circumferential direction of the stator yoke 34, a second air duct 123 is formed between every two adjacent stator teeth 36, each second air duct 123 is opposite to and communicated with at least one first air duct 121 to jointly form a main air duct 125, the main air duct 125 penetrates through the housing 10 along an axial direction, and the main air duct 125 can serve as a heat dissipation air duct of the motor 100 to guide part of air flow to blow toward the stator assembly for heat dissipation. Further, the stator assembly 30 is located between the support 20 and the air outlet 212, and the stator assembly 30 and the center seat 22 are disposed in parallel and spaced apart along the axial direction, so as to allow the air flow from the first air duct 121 to the second air duct 123 and then from the air outlet 212 to the outside.

Further, in the present embodiment, since the air guide plate 24 is designed to be inclined (inclined or spiral with respect to the axial direction), the air flow is blown out from the first air duct 121 obliquely along the inclined direction of the air guide plate 24 when passing through the air guide plate 24, and then is blown out from the second air duct 123 approximately parallel to the axial direction when passing through the stator assembly 30, so that the air flow is blown out more smoothly, and the efficiency and the heat dissipation effect of the motor 100 are improved.

In particular, in the present embodiment, the stator yoke 34 has a substantially annular structure, and the stator yoke 34 has an outer wall 343 circumferentially surrounding, the outer wall 343 being opposite to and overlapping the inner wall of the housing 10. Specifically, the end surface of the stator yoke 34 is stacked on the first support step 167 and is disposed at a distance from the end surface of the wind guide plate 24. The other end surface of the stator yoke 34 is overlapped on the second supporting step 187 and is disposed opposite to the end surface of the supporting member 60 at a spaced apart relation to limit the installation position of the stator assembly 30. Further, the first positioning portion 14 is disposed on the inner wall of the second housing 18, the second positioning portion 32 is disposed on the outer periphery of the stator yoke 34, and the first positioning portion 14 and the second positioning portion 32 are nested with each other, so that the connection between the stator assembly 30 and the second housing 18 is more firm, the positioning is reliable, and the rotation is not easy to occur. Further, in the present embodiment, the specific matching manner of the first positioning portion 14 and the second positioning portion 32 is not limited, one of the first positioning portion 14 and the second positioning portion 32 is a protrusion, the other is a groove, the protrusion and the groove extend along the axial direction, and the protrusion is embedded in the groove to limit the position of the stator yoke 34 relative to the second housing 18. For example, the first positioning portion 14 may be a groove (the extending direction of the groove coincides with the axial direction), and the second positioning portion 32 may be a protrusion that mates with the groove; for another example, the first positioning portion 14 may be a protrusion, and the second positioning portion 32 may be a groove (the extending direction of the groove coincides with the axial direction) that mates with the protrusion.

Further, in the present disclosure, the number of the first positioning portions 14 and the second positioning portions 32 is not limited, in this embodiment, the number of the first positioning portions 14 may be six, the six first positioning portions 32 are distributed on the inner wall of the second housing 18 at substantially equal intervals, and correspondingly, the number of the second positioning portions 32 is also six, and the six second positioning portions 32 and the first positioning portions 14 are nested one by one, so as to improve the connection stability between the stator assembly 30 and the second housing 18.

In the present embodiment, the stator yoke 34 is substantially attached to the inner wall of the second housing 18, so that the inner space of the second housing 18 is fully utilized, the diameter of the stator yoke 34 can be made relatively large, and the output power of the rotor 40 is large under the condition that the volume of the motor 100 is certain (or limited), so that the wind output is also large; the overall volume of the motor 100 can be made relatively small while satisfying a certain power.

In the present embodiment, a plurality of stator teeth 36 are circumferentially distributed around the inner peripheral wall of the stator yoke 34 and extend inward of the holes of the stator yoke 34. The side of the plurality of stator teeth 36 remote from the stator yoke 34 together form a second shaft bore 35, the second shaft bore 35 being located at a generally central location of the stator assembly 30, the second shaft bore 35 being in communication with the first cavity 161 and the second cavity 181. The second shaft hole 35 is for mounting the rotor 40 of the motor 100.

The present utility model is not limited in the number of stator teeth 36. For example, in the present embodiment, the number of the stator teeth 36 is half of the number of the air guiding fins 24, and each stator tooth 54 has an overlapping portion with the projection of the corresponding air guiding fin 24 in the axial direction, so as to ensure that the first air duct 121 and the second air duct 123 can be directly and relatively communicated along the axial direction of the motor 100, thereby improving the heat dissipation power of the motor 100, and thus improving the heat dissipation effect of the motor 100. As yet other embodiments, the number of stator teeth 54 and wind scoopers 24 may be the same.

In the present embodiment, the stator assembly 30 further includes a plurality of stator windings 38, and the plurality of stator windings 38 are wound around the plurality of stator teeth 36 in a one-to-one correspondence manner to generate the rotating magnetic field. Further, the length dimension L1 of the wind guiding plate 24 in the axial direction is smaller than the length dimension L2 of the stator teeth 36 in the axial direction of the stator yoke 34 (as shown in fig. 7); in one embodiment, the ratio of L2 to L1 may be not less than 2, and in a more preferred embodiment, the ratio of L2 to L1 may be not less than 3. The thickness dimension L3 of the air guide plate 24 is equal to the ratio of the dimension of the width L4 of the stator winding 38 along the circumferential direction of the stator yoke 34 between 0.8 and 1.2 (as shown in fig. 8 and 9), so that the air flow can smoothly flow to the stator winding 38, the volume of the motor 100 can be greatly reduced while the performance of the motor 100 is unchanged, and the manufacturing cost of the motor 100 can be reduced.

Further, the ratio of the length L5 of the stator teeth 36 along the radial direction of the stator yoke 34 to the width L4 of the stator windings 38 along the circumferential direction of the stator yoke 34 is greater than or equal to 2 (as shown in fig. 9), so that the stator teeth 36 are substantially in a slender plate shape, which can make the air flow better flow to the stator windings 38, reduce the loss of the air flow, improve the efficiency of the motor 100, and dissipate the heat of the stator windings 38 without blocking the air outlet holes 212, and reduce the influence on the flow and noise of the air drying apparatus 200.

In the present embodiment, the support member 60 is mounted in the second housing 18, and the support member 60 is provided with a plurality of ventilation openings 62, and the ventilation openings 62 are in communication with the accommodating chamber 12 and the outside, so as to enable the air flow to better flow from the accommodating chamber 12 to the outside.

In the present embodiment, the support member 60 further includes a base 64 and a plurality of support portions 66, wherein the base 64 is disposed in the accommodating cavity 12 and spaced apart from the inner wall of the housing 10. Specifically, the seat 64 is disposed in the second cavity 181 and is fixedly connected to the second housing 18. Further, the seat 64 is provided with a third shaft hole 641, the third shaft hole 641 is located at a substantially middle position of the seat 64, and the third shaft hole 641 is communicated with the second cavity 181 for passing through the central shaft. The supporting portions 66 are connected between the base 64 and the housing 10, and the plurality of supporting portions 66 are sequentially spaced apart along the circumferential direction of the base 64, and the ventilation opening 62 is formed between every two adjacent supporting portions 66.

In the present embodiment, the central shaft 50 is sequentially disposed through the bracket 20, the rotor 40 and the support member 60, and the rotor 40 can rotate around the central shaft 50 relative to the stator assembly 30. The first and second sections 52, 54 of the central shaft 50 are connected in series in the axial direction, and in some embodiments, the first and second sections 52, 54 may be integrally formed, and in other embodiments, the first and second sections 52, 54 may be assembled. The first section 52 is disposed through the bracket 20, specifically, the first section 52 is disposed through the first shaft hole 221 of the center seat 22 and protrudes away from the stator assembly 30 relative to the center seat 22. The second section 54 is disposed through the support 60, specifically, the second section is disposed through the third shaft hole 641 of the base 64 and protrudes away from the stator assembly 30 relative to the base 64.

The present description does not limit the inner diameter dimensions of the first and second sections 52, 54. For example, in the present embodiment, the inner diameter dimension of the first section 52 is equal to the inner diameter dimension of the second section 54. As another example, in other embodiments, to better accommodate the dimensions of the first shaft bore 221 and the third shaft bore 641, the inner diameter dimension of the first section 52 may be greater than the inner diameter dimension of the second section 54, and the inner diameter dimension of the first section 52 may be less than the inner diameter dimension of the second section 54.

In this embodiment, the first bearing 70 is disposed in the first shaft hole 221 of the center seat 22 and sleeved on the first section 52, and the first bearing 70 is used for fixing the first section 52 to reduce the shake of the first section 52 of the center shaft 50, so that the first section 52 of the center shaft 50 is more stable. The second bearing 80 is disposed in the third shaft hole 641 of the seat body 64 and sleeved on the second section 54, and the second bearing 80 is used for fixing the second section 54, reducing shake of the second section 54 of the central shaft 50, and making the second section 54 of the central shaft 50 more stable.

Referring to fig. 10, in the present embodiment, in order to further improve the stability of the central shaft 50 in the motor 100, the motor 100 further includes a third bearing 75, and the third bearing 75 is sleeved on the first section 52 and is located between the first section 52 and the bracket 20. The third bearing 75 and the first bearing 70 are both disposed within the center housing 22, and the third bearing 75 is located between the first bearing 70 and the second bearing 80. Specifically, the third bearing 75 is disposed in the first shaft hole 221 of the center seat 22 and located between the first bearing 70 and the rotor 40, and the third bearing 75 is used for fixing the first section 52, reducing the shake of the first section 52 of the center shaft 50, and making the first section 52 of the center shaft 50 more stable. Accordingly, the present utility model supports the central shaft 50 through the first bearing 70, the third bearing 75, and the second bearing 80, increasing the operational stability of the motor 100, thereby playing a role in reducing noise and extending the service life of the motor 100.

Referring again to fig. 5-6, in the present embodiment, the motor 100 further includes an impeller 90, and the impeller 90 is disposed on a side of the support 20 facing away from the stator assembly 30 and is connected to the central shaft 50. The air flow generated after the impeller 90 is driven is outwardly diffused through the plurality of first air channels 121 and the plurality of second air channels 123 to dissipate heat from the stator assembly 30.

In particular, in the present embodiment, impeller 90 includes a hub 92 and a plurality of blades 94. The hub 92 is disposed in the first cavity 161 of the first housing 16, and the hub 92 and the stator assembly 30 are disposed on opposite sides of the center seat 22. The blades 94 are of a sheet-like structure having a curved surface, and the plurality of blades 94 are sequentially distributed on the outer side of the hub 92, and the number of the blades 94 is not limited in this specification, for example, the number of the blades 94 may be greater than or equal to 11 and less than or equal to 16, and in this embodiment, the number of the blades 94 may be 15. In the present embodiment, the plurality of blades 94 are rotated to generate an air flow, which is blown to the second air duct 123 via the first air duct 121 to cool the internal structure of the motor 100.

During operation, current is input into the stator winding 38 of the stator assembly 30 to generate a magnetic field, the rotor 40 rotates and drives the impeller 90 to rotate, and the disturbed airflow is blown to the stator assembly 30 via the first air duct 121, and then can dissipate heat of the stator assembly 30 when passing through the second air duct 123, so as to dissipate heat of the motor 100, so that the motor 100 has good heat dissipation capability.

In the motor provided by the embodiment of the utility model, the stator assembly and the shell can be mutually limited through the positioning structure, specifically, the inner wall of the shell is provided with the first positioning part, the periphery of the stator assembly is provided with the second positioning part, and the first positioning part and the second positioning part are mutually nested, so that the stator assembly and the shell are more firmly connected, are reliably positioned and are not easy to rotate. The center shaft is provided with a first section and a second section which are opposite, the first bearing is sleeved on the first section and is positioned between the first section and the bracket, the second bearing is sleeved on the second section and is positioned between the second section and the supporting piece, and the first bearing and the second bearing are jointly used for supporting the center shaft.

The motor supports the central shaft through the first bearing and the second bearing, so that both ends of the central shaft are supported, and the shaking of the central shaft can be reduced by utilizing the rotation performance of the bearing and a small amount of supporting elasticity, so that the central shaft and the motor are more stable, and the running noise is relatively smaller. Further, the stator assembly and the shell are nested with each other through the first positioning part and the second positioning part, so that the positioning operation between the stator assembly and the shell is simpler, and the positioning accuracy is high.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (13)

1. An electric machine, comprising:

the shell is provided with a containing cavity, and the containing cavity penetrates through the shell along the axial direction of the motor; the inner wall of the shell is provided with a first positioning part;

the bracket is arranged in the accommodating cavity and connected with the shell;

the stator assembly is arranged in the accommodating cavity, and the stator assembly and the bracket are arranged in parallel along the axial direction; the periphery of the stator assembly is provided with a second positioning part, and the first positioning part and the second positioning part are nested with each other;

a rotor rotatably disposed within the stator assembly;

the central shaft penetrates through the rotor and the bracket, the central shaft is provided with a first section and a second section which are opposite, and the first section and the second section respectively protrude relative to two ends of the rotor;

the support piece is arranged in the accommodating cavity and connected with the shell, and the second section penetrates through the support piece;

the first bearing is sleeved on the first section and is positioned between the first section and the bracket; and

the second bearing is sleeved on the second section and is positioned between the second section and the supporting piece.

2. The motor of claim 1, wherein the bracket comprises a center seat and a plurality of air guide plates, and the plurality of air guide plates are sequentially arranged at intervals on the periphery of the center seat so as to divide the accommodating cavity into a plurality of first air channels; the stator assembly comprises a stator yoke and a plurality of stator teeth, wherein the stator teeth are connected to the inner peripheral wall of the stator yoke and are sequentially arranged at intervals along the circumferential direction of the stator yoke; a second air channel is formed between every two adjacent stator teeth; each second air channel is communicated with at least one first air channel to jointly form a main air channel of the motor, and the main air channel penetrates through the shell along the axial direction.

3. The motor of claim 2, wherein the stator assembly further comprises a plurality of stator windings, the plurality of stator windings being wound around the stator teeth in a one-to-one correspondence, and the length dimension of the wind guiding plate in the axial direction is smaller than the length dimension of the stator teeth in the axial direction of the stator yoke.

4. A motor according to claim 3, wherein a ratio of a length dimension of the stator teeth in a radial direction of the stator yoke to a width dimension of the stator windings in a circumferential direction of the stator yoke is greater than or equal to 2.

5. The motor of claim 1, wherein the first section is disposed through the support, and further comprising a third bearing disposed around the first section and between the first section and the support, the first bearing and the third bearing being disposed in parallel along the axial direction.

6. The motor of claim 5, wherein the bracket further comprises a center seat disposed in the receiving cavity and fixedly connected to the housing, the first section is disposed through the center seat, the third bearing and the first bearing are both disposed in the center seat, and the third bearing is disposed between the first bearing and the rotor.

7. The motor of claim 1, wherein the support is provided with a plurality of vents, the vents being in communication with the receiving cavity and the outside.

8. The motor of claim 7, wherein the support member includes a housing disposed within the receiving cavity and spaced apart from an inner wall of the housing, and a plurality of support portions; the supporting piece is connected between the seat body and the shell, and the plurality of supporting parts are sequentially arranged at intervals along the circumferential direction of the seat body; the ventilation openings are formed between every two adjacent supporting parts.

9. The motor of claim 1, wherein the housing comprises a first housing and a second housing, the first housing and the second housing continuing in the axial direction, the receiving cavity extending through the first housing and the second housing; the support is installed in the first shell, and the support piece is installed in the second shell.

10. The motor of claim 9, wherein the first housing includes a first portion and a second portion that are contiguous, the first portion having an inner diameter that is smaller than an inner diameter of the second portion such that a junction of the first portion and the second portion forms a first support step, the stator assembly being stacked on the first support step; or/and (b)

The second shell comprises a third part and a fourth part which are connected with each other, the inner diameter of the third part is smaller than that of the fourth part, so that a second supporting step is formed at the joint of the third part and the fourth part, and the stator assembly is overlapped on the second supporting step.

11. The motor of any one of claims 1 to 10, wherein one of the first positioning portion and the second positioning portion is a projection, and the other is a groove, both of which extend in the axial direction, and the projection is embedded in the groove.

12. The motor of any one of claims 1 to 10, further comprising an impeller disposed on a side of the bracket facing away from the stator assembly and connected to the central shaft.

13. An air drying apparatus, comprising:

the shell is provided with an air outlet; and

the motor of any one of claims 1 to 12, disposed within the housing, the stator assembly being located between the bracket and the air outlet.